marco's questions

After hunting down some ethernet issues since last autumn I think I narrowed it down finally to a driver / kernel issue.

I opened some other threads here:

Internet sites are loading slowly sometimes with Firefox and Chromium

resolv.conf and sporadic slow host resolving (DNS issue) - Ubuntu 20.04

Websites takes some seconds to start loading sporadically - resolve hostname - DNS issue?

When surfing with my onboard REALTEK ethernet ( Mobo: MSI model: H81M-E34 (MS-7817) v: 3.0, BIOS: American Megatrends v: 17.5 date: 03/30/2015) websites sporadically load only after 5 or even 10 seconds as the DNS response sometimes take 5 or more seconds. I installed wireshark and saw that this is due to timeouts (DNS or TCP). When using an external USB ethernet adapter it's working fine, so my network configuration is fine.

When using Manjaro or an Ubuntu 20.04 live image I'm getting the same problems. However, when using a Debian Buster image no such issues occur. With Debian I haven't tested it extensively, but but while using it it was fine. I also switched from Buster to Ubuntu 20.04 and didn't recognize such issues with Debian Buster before, so this is all consistent.

As an solution I just could use the external adapter of course, but it would be nicer if I get the internal ethernet working again.

Does anyone else oberve similar issues with the Realtek 8169 driver in more recent kernels and would it help to install the dkms-8168 driver? I haven't done this yet, cause I read the people didn't have internet after installing and even after purging the driver. Or should I use a more recent kernel?

Some more info about my hardware:

    Kernel: 5.4.0-62-lowlatency x86_64 bits: 64 Desktop: Xfce 4.14.2 
           Distro: Ubuntu 20.04.1 LTS (Focal Fossa) 
Machine:   Type: Desktop Mobo: MSI model: H81M-E34 (MS-7817) v: 3.0 serial: <superuser/root required> 
           BIOS: American Megatrends v: 17.5 date: 03/30/2015 
CPU:       Topology: Quad Core model: Intel Core i5-4460 bits: 64 type: MCP L2 cache: 6144 KiB 
           Speed: 3335 MHz min/max: 800/3400 MHz Core speeds (MHz): 1: 3354 2: 3395 3: 3376 4: 3318 
Graphics:  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics driver: i915 v: kernel 
           Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1080~60Hz 
           OpenGL: renderer: Mesa DRI Intel HD Graphics 4600 (HSW GT2) v: 4.5 Mesa 20.2.6 
Audio:     Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio driver: snd_hda_intel 
           Device-2: BEHRINGER UMC204HD 192k type: USB driver: snd-usb-audio 
           Device-3: AKAI Professional M.I. type: USB driver: hid-generic,snd-usb-audio,usbhid 
           Sound Server: ALSA v: k5.4.0-62-lowlatency 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 
           IF: enp2s0 state: down mac: d8:cb:8a:e8:e9:99 
           Device-2: Realtek RTL8153 Gigabit Ethernet Adapter type: USB driver: r8152 
           IF: enx00e04c000176 state: up speed: 1000 Mbps duplex: full mac: 00:e0:4c:00:01:76 
Drives:    Local Storage: total: 537.79 GiB used: 97.03 GiB (18.0%) 
           ID-1: /dev/sda vendor: Samsung model: SSD 850 EVO 250GB size: 232.89 GiB 
           ID-2: /dev/sdb type: USB vendor: Samsung model: Portable SSD T5 size: 232.89 GiB 
           ID-3: /dev/sdc type: USB vendor: Transcend model: JetFlash Transcend 16GB size: 14.71 GiB 
           ID-4: /dev/sdd type: USB vendor: SanDisk model: Ultra size: 57.30 GiB 
Partition: ID-1: / size: 36.41 GiB used: 12.32 GiB (33.8%) fs: ext4 dev: /dev/sda1 
           ID-2: /home size: 184.23 GiB used: 84.71 GiB (46.0%) fs: ext4 dev: /dev/sda6 
           ID-3: swap-1 size: 7.45 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda5 
Sensors:   System Temperatures: cpu: 30.0 C mobo: N/A 
           Fan Speeds (RPM): N/A 
Info:      Processes: 221 Uptime: 1h 08m Memory: 7.23 GiB used: 2.93 GiB (40.6%) Shell: bash inxi: 3.0.38 

Edit: Must be a driver problem. The UGREEN ASIX AX88179 is constantly disconnecting on one of my ports (see below). I ordered an ANKER dongle wich works stable on both ports.

It's using:

Realtek RTL8153 Gigabit Ethernet Adapter type: USB driver: r8152 

My HW:

Kernel: 5.4.0-62-lowlatency x86_64 bits: 64 Desktop: Xfce 4.14.2 
           Distro: Ubuntu 20.04.1 LTS (Focal Fossa) 
Machine:   Type: Desktop Mobo: MSI model: H81M-E34 (MS-7817) v: 3.0 serial: <superuser/root required> 
           BIOS: American Megatrends v: 17.5 date: 03/30/2015 
CPU:       Topology: Quad Core model: Intel Core i5-4460 bits: 64 type: MCP L2 cache: 6144 KiB 
           Speed: 3361 MHz min/max: 800/3400 MHz Core speeds (MHz): 1: 3345 2: 3385 3: 3335 4: 3316 
Graphics:  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics driver: i915 v: kernel 
           Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1080~60Hz 
           OpenGL: renderer: Mesa DRI Intel HD Graphics 4600 (HSW GT2) v: 4.5 Mesa 20.2.6 
Audio:     Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio driver: snd_hda_intel 
           Device-2: BEHRINGER UMC204HD 192k type: USB driver: snd-usb-audio 
           Device-3: AKAI Professional M.I. type: USB driver: hid-generic,snd-usb-audio,usbhid 
           Sound Server: ALSA v: k5.4.0-62-lowlatency 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 
           IF: enp2s0 state: down mac: d8:cb:8a:e8:e9:99 
           Device-2: Realtek RTL8153 Gigabit Ethernet Adapter type: USB driver: r8152 
           IF: enx00e04c000176 state: up speed: 1000 Mbps duplex: full mac: 00:e0:4c:00:01:76 
Drives:    Local Storage: total: 537.79 GiB used: 95.49 GiB (17.8%) 
           ID-1: /dev/sda vendor: Samsung model: SSD 850 EVO 250GB size: 232.89 GiB 
           ID-2: /dev/sdb type: USB vendor: Samsung model: Portable SSD T5 size: 232.89 GiB 
           ID-3: /dev/sdc type: USB vendor: Transcend model: JetFlash Transcend 16GB size: 14.71 GiB 
           ID-4: /dev/sdd type: USB vendor: SanDisk model: Ultra size: 57.30 GiB 
Partition: ID-1: / size: 36.41 GiB used: 12.20 GiB (33.5%) fs: ext4 dev: /dev/sda1 
           ID-2: /home size: 184.23 GiB used: 83.29 GiB (45.2%) fs: ext4 dev: /dev/sda6 
           ID-3: swap-1 size: 7.45 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda5 
Sensors:   System Temperatures: cpu: 32.0 C mobo: N/A 
           Fan Speeds (RPM): N/A 
Info:      Processes: 216 Uptime: 25m Memory: 7.23 GiB used: 1.81 GiB (25.0%) Shell: bash inxi: 3.0.38 

I ordered a UGREEN ASIX AX88179 USB 3 ethernet dongle and I'm having some issues with it: I tested it on an USB 2 port and there the dongle seems to work fine. On the back I tested it on two USB 3 ports. On one of the ports the network is constantly diconnecting and reconnecting. The journal entry looks like this:

    Jan 13 23:07:18 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: unregister 'ax88179_178a' usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet
Jan 13 23:07:18 marco-MS-7817 kernel: usb 6-3: Manufacturer: ASIX Elec. Corp.
Jan 13 23:07:18 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 eth0: register 'ax88179_178a' at usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet, 00:0e:c6:74:5d:eb
Jan 13 23:07:21 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: unregister 'ax88179_178a' usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet
Jan 13 23:07:21 marco-MS-7817 kernel: usb 6-3: Manufacturer: ASIX Elec. Corp.
Jan 13 23:07:21 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 eth0: register 'ax88179_178a' at usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet, 00:0e:c6:74:5d:eb
Jan 13 23:07:24 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: unregister 'ax88179_178a' usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet
Jan 13 23:07:24 marco-MS-7817 kernel: usb 6-3: Manufacturer: ASIX Elec. Corp.
Jan 13 23:07:24 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 eth0: register 'ax88179_178a' at usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet, 00:0e:c6:74:5d:eb
Jan 13 23:07:30 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: unregister 'ax88179_178a' usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet
Jan 13 23:07:31 marco-MS-7817 kernel: usb 6-3: Manufacturer: ASIX Elec. Corp.
Jan 13 23:07:31 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 eth0: register 'ax88179_178a' at usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet, 00:0e:c6:74:5d:eb
Jan 13 23:07:41 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: unregister 'ax88179_178a' usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet

and the complete version:

Jan 13 23:07:06 marco-MS-7817 named[800]: managed-keys-zone: Key 20326 for zone . is now trusted (acceptance timer complete)
Jan 13 23:07:15 marco-MS-7817 systemd-resolved[617]: Using degraded feature set (UDP) for DNS server 192.168.178.1.
Jan 13 23:07:16 marco-MS-7817 systemd[1]: NetworkManager-dispatcher.service: Succeeded.
Jan 13 23:07:18 marco-MS-7817 avahi-daemon[653]: Interface enx000ec6745deb.IPv4 no longer relevant for mDNS.
Jan 13 23:07:18 marco-MS-7817 kernel: usb 6-3: USB disconnect, device number 27
Jan 13 23:07:18 marco-MS-7817 kernel: xhci_hcd 0000:03:00.0: WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state.
Jan 13 23:07:18 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: unregister 'ax88179_178a' usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet
Jan 13 23:07:18 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: Failed to read reg index 0x0002: -19
Jan 13 23:07:18 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: Failed to write reg index 0x0002: -19
Jan 13 23:07:18 marco-MS-7817 avahi-daemon[653]: Leaving mDNS multicast group on interface enx000ec6745deb.IPv4 with address 192.168.178.33.
Jan 13 23:07:18 marco-MS-7817 NetworkManager[662]: <info>  [1610575638.2244] device (enx000ec6745deb): state change: activated -> unmanaged (reason 'removed', sys-iface-state: 'removed')
Jan 13 23:07:18 marco-MS-7817 avahi-daemon[653]: Withdrawing address record for 192.168.178.33 on enx000ec6745deb.
Jan 13 23:07:18 marco-MS-7817 whoopsie[2095]: [23:07:18] Cannot reach: https://daisy.ubuntu.com
Jan 13 23:07:18 marco-MS-7817 whoopsie[2095]: [23:07:18] offline
Jan 13 23:07:18 marco-MS-7817 named[800]: no longer listening on 192.168.178.33#53
Jan 13 23:07:18 marco-MS-7817 NetworkManager[662]: <info>  [1610575638.2287] dhcp4 (enx000ec6745deb): canceled DHCP transaction
Jan 13 23:07:18 marco-MS-7817 NetworkManager[662]: <info>  [1610575638.2287] dhcp4 (enx000ec6745deb): state changed bound -> done
Jan 13 23:07:18 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb (unregistered): Failed to write reg index 0x0002: -19
Jan 13 23:07:18 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb (unregistered): Failed to write reg index 0x0001: -19
Jan 13 23:07:18 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb (unregistered): Failed to write reg index 0x0002: -19
Jan 13 23:07:18 marco-MS-7817 NetworkManager[662]: <info>  [1610575638.2296] manager: NetworkManager state is now DISCONNECTED
Jan 13 23:07:18 marco-MS-7817 dbus-daemon[661]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.10' (uid=0 pid=662 comm="/usr/sbin/NetworkManager --no-daemon " label="unconf>
Jan 13 23:07:18 marco-MS-7817 systemd[1]: Starting Network Manager Script Dispatcher Service...
Jan 13 23:07:18 marco-MS-7817 dbus-daemon[661]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jan 13 23:07:18 marco-MS-7817 systemd[1]: Started Network Manager Script Dispatcher Service.
Jan 13 23:07:18 marco-MS-7817 nm-dispatcher[18403]: run-parts: failed to stat component /etc/network/if-post-down.d/avahi-daemon: No such file or directory
Jan 13 23:07:18 marco-MS-7817 kernel: usb 6-3: new SuperSpeed Gen 1 USB device number 28 using xhci_hcd
Jan 13 23:07:18 marco-MS-7817 kernel: usb 6-3: New USB device found, idVendor=0b95, idProduct=1790, bcdDevice= 1.00
Jan 13 23:07:18 marco-MS-7817 kernel: usb 6-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Jan 13 23:07:18 marco-MS-7817 kernel: usb 6-3: Product: AX88179
Jan 13 23:07:18 marco-MS-7817 kernel: usb 6-3: Manufacturer: ASIX Elec. Corp.
Jan 13 23:07:18 marco-MS-7817 kernel: usb 6-3: SerialNumber: 00000000000179
Jan 13 23:07:18 marco-MS-7817 NetworkManager[662]: <info>  [1610575638.8005] manager: (eth0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/143)
Jan 13 23:07:18 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 eth0: register 'ax88179_178a' at usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet, 00:0e:c6:74:5d:eb
Jan 13 23:07:18 marco-MS-7817 mtp-probe[18413]: checking bus 6, device 28: "/sys/devices/pci0000:00/0000:00:1c.5/0000:03:00.0/usb6/6-3"
Jan 13 23:07:18 marco-MS-7817 mtp-probe[18413]: bus: 6, device: 28 was not an MTP device
Jan 13 23:07:18 marco-MS-7817 systemd-udevd[18384]: Using default interface naming scheme 'v245'.
Jan 13 23:07:18 marco-MS-7817 systemd-udevd[18384]: ethtool: autonegotiation is unset or enabled, the speed and duplex are not writable.
Jan 13 23:07:18 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: renamed from eth0
Jan 13 23:07:18 marco-MS-7817 NetworkManager[662]: <info>  [1610575638.8301] device (eth0): interface index 143 renamed iface from 'eth0' to 'enx000ec6745deb'
Jan 13 23:07:18 marco-MS-7817 NetworkManager[662]: <info>  [1610575638.8368] device (enx000ec6745deb): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Jan 13 23:07:18 marco-MS-7817 mtp-probe[18418]: checking bus 6, device 28: "/sys/devices/pci0000:00/0000:00:1c.5/0000:03:00.0/usb6/6-3"
Jan 13 23:07:18 marco-MS-7817 mtp-probe[18418]: bus: 6, device: 28 was not an MTP device
Jan 13 23:07:19 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: ax88179 - Link status is: 1
Jan 13 23:07:21 marco-MS-7817 ModemManager[802]: <info>  Couldn't check support for device '/sys/devices/pci0000:00/0000:00:1c.5/0000:03:00.0/usb6/6-3': not supported by any plugin
Jan 13 23:07:21 marco-MS-7817 kernel: usb 6-3: USB disconnect, device number 28
Jan 13 23:07:21 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: unregister 'ax88179_178a' usb-0000:03:00.0-3, ASIX AX88179 USB 3.0 Gigabit Ethernet
Jan 13 23:07:21 marco-MS-7817 kernel: xhci_hcd 0000:03:00.0: WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state.
Jan 13 23:07:21 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: Failed to read reg index 0x0002: -19
Jan 13 23:07:21 marco-MS-7817 kernel: ax88179_178a 6-3:1.0 enx000ec6745deb: Failed to write reg index 0x0002: -19

On the USB 3 port next to the one from above the connection is much more stable and it lost connection only once (which of course is also not acceptable).

The driver is part of the kernel and the device should work without any issues. However when searching the web there are more people having similar issues with USB3 (also on Windows or Mac). I can exchnage the dongle and just get another one which works. Can you recommend something? Is realtek for example "the better" firmware?

I also don't understand why there's such a big difference between the two USB3 ports. I copied a 3GB several times to a USB Stick connected to the "bad" USB port and checked the sha sum. It's working fine, so I guess the port is not the problem.

My system conf:

Kernel: 5.4.0-60-lowlatency x86_64 bits: 64 Desktop: Xfce 4.14.2 
           Distro: Ubuntu 20.04.1 LTS (Focal Fossa) 
Machine:   Type: Desktop Mobo: MSI model: H81M-E34 (MS-7817) v: 3.0 serial: <superuser/root required> 
           BIOS: American Megatrends v: 17.5 date: 03/30/2015 
CPU:       Topology: Quad Core model: Intel Core i5-4460 bits: 64 type: MCP L2 cache: 6144 KiB 
           Speed: 3309 MHz min/max: 800/3400 MHz Core speeds (MHz): 1: 3277 2: 3386 3: 3334 4: 3336 
Graphics:  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics driver: i915 v: kernel 
           Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1080~60Hz 
           OpenGL: renderer: Mesa DRI Intel HD Graphics 4600 (HSW GT2) v: 4.5 Mesa 20.2.6 
Audio:     Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio driver: snd_hda_intel 
           Device-2: BEHRINGER UMC204HD 192k type: USB driver: snd-usb-audio 
           Device-3: AKAI Professional M.I. type: USB driver: hid-generic,snd-usb-audio,usbhid 
           Sound Server: ALSA v: k5.4.0-60-lowlatency 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 
           IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: d8:cb:8a:e8:e9:99 
Drives:    Local Storage: total: 635.72 GiB used: 204.64 GiB (32.2%) 
           ID-1: /dev/sda vendor: Samsung model: SSD 850 EVO 250GB size: 232.89 GiB 
           ID-2: /dev/sdb type: USB vendor: Samsung model: Portable SSD T5 size: 232.89 GiB 
           ID-3: /dev/sdc type: USB vendor: SanDisk model: Ultra size: 57.30 GiB 
           ID-4: /dev/sdd type: USB vendor: Transcend model: JetFlash Transcend 128GB size: 112.64 GiB 
Partition: ID-1: / size: 36.41 GiB used: 11.53 GiB (31.7%) fs: ext4 dev: /dev/sda1 
           ID-2: /home size: 184.23 GiB used: 79.05 GiB (42.9%) fs: ext4 dev: /dev/sda6 
           ID-3: swap-1 size: 7.45 GiB used: 47.2 MiB (0.6%) fs: swap dev: /dev/sda5 
Sensors:   System Temperatures: cpu: 30.0 C mobo: N/A 
           Fan Speeds (RPM): N/A 
Info:      Processes: 221 Uptime: 1h 20m Memory: 7.23 GiB used: 2.11 GiB (29.2%) Shell: bash inxi: 3.0.38 


lsusb -v -s 006:009

Bus 006 Device 009: ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               3.00
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass       255 Vendor Specific Subclass
  bDeviceProtocol         0 
  bMaxPacketSize0         9
  idVendor           0x0b95 ASIX Electronics Corp.
  idProduct          0x1790 AX88179 Gigabit Ethernet
  bcdDevice            1.00
  iManufacturer           1 
  iProduct                2 
  iSerial                 3 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0039
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              496mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol      0 
      iInterface              4 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval              11
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               3
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst              15

since last autumn I'm struggeling to find what's wrong with my network configuration on Ubuntustudio 20.04 which is basically a Ubuntu 20.04.

I installed from scratch last autumn with the official Ubuntustudio 20.04 iso.

The strange thing is that my resolv.conf links to ../run/resolvconf/resolv.conf

    /etc/resolv.conf
lrwxrwxrwx 1 root root 29 Sep 27 22:10 /etc/resolv.conf -> ../run/resolvconf/resolv.conf

However, in the point release version 20.04.1 it obviously points to ../run/systemd/resolve/stub-resolv.conf.

The content in ../run/resolvconf/resolv.conf is

nameserver 127.0.0.53
search fritz.box

I'm having another resolv.conf file in /run/systemd/resolve with exactly the same content. The time stamps of both files are different though: The file in ../run/resolvconf has the time stamp of the time when I switched on my machine. The file in /run/systemd/resolve/ has a time stamp which is 30 min old.

In the folder /run/systemd/resolve/ there's also a stub-resolv.conf file with content:

nameserver 127.0.0.53
options edns0 trust-ad
search fritz.box

Does this all make sense and can somebody clearify this? Could this be the cause of my DNS issues? Very sporadically the DNS lookup in Firefox takes 5 s or more. This happens about 20 time per day or more, but not always. When I tell Firefox to use DNS over HTTPS all is fine.

When I use dig in the terminal this also works most of the time, but sometimes there's a delay of several setting until I get any output. The DNS lookup times in this case are however also short on the order of 20 ms.

For instance this took ~10 s until I got the first output

traceroute facebook.com
traceroute to facebook.com (69.171.250.35), 30 hops max, 60 byte packets
 1  fritz.box (192.168.178.1)  9.270 ms  9.211 ms  9.272 ms
 2  loopback1.0002.acln.01.off.de.net.telefonica.de (62.52.200.219)  47.276 ms  47.403 ms  47.400 ms
 3  bundle-ether12.0001.dbrx.01.off.de.net.telefonica.de (62.53.12.0)  24.104 ms  24.351 ms  27.042 ms
 4  ae3-0.0001.corx.01.off.de.net.telefonica.de (62.53.28.154)  31.595 ms  36.469 ms  36.011 ms
 5  ae10-0.0001.corx.06.ham.de.net.telefonica.de (62.53.0.48)  33.152 ms ae4-0.0002.corx.02.ber.de.net.telefonica.de (62.53.0.72)  36.903 ms ae10-0.0001.corx.06.ham.de.net.telefonica.de (62.53.0.48)  35.555 ms
 6  bundle-ether1.0006.dbrx.01.ham.de.net.telefonica.de (62.53.14.27)  35.957 ms ae1-0.0002.dbrx.01.dus.de.net.telefonica.de (62.53.16.36)  24.730 ms bundle-ether2.0005.dbrx.01.ham.de.net.telefonica.de (62.53.14.231)  26.659 ms
 7  ae0-0.0002.prrx.01.ham.de.net.telefonica.de (62.53.6.109)  26.043 ms ae1-0.0002.prrx.01.ham.de.net.telefonica.de (62.53.6.207)  26.547 ms  27.471 ms
 8  ae0.pr02.ham3.tfbnw.net (157.240.72.132)  25.267 ms  25.832 ms  26.783 ms
 9  po102.psw04.ham3.tfbnw.net (74.119.78.17)  26.633 ms po102.psw03.ham3.tfbnw.net (74.119.78.5)  26.436 ms po102.psw01.dus1.tfbnw.net (157.240.35.105)  23.561 ms
10  157.240.38.185 (157.240.38.185)  23.765 ms 157.240.38.73 (157.240.38.73)  25.523 ms 173.252.67.59 (173.252.67.59)  25.862 ms
11  edge-star-mini-shv-01-any2.facebook.com (69.171.250.35)  24.973 ms  26.343 ms  24.574 ms

systemd-resolve --status
Global
       LLMNR setting: no                  
MulticastDNS setting: no                  
  DNSOverTLS setting: no                  
      DNSSEC setting: no                  
    DNSSEC supported: no                  
          DNS Domain: fritz.box           
          DNSSEC NTA: 10.in-addr.arpa     
                      16.172.in-addr.arpa 
                      168.192.in-addr.arpa
                      17.172.in-addr.arpa 
                      18.172.in-addr.arpa 
                      19.172.in-addr.arpa 
                      20.172.in-addr.arpa 
                      21.172.in-addr.arpa 
                      22.172.in-addr.arpa 
                      23.172.in-addr.arpa 
                      24.172.in-addr.arpa 
                      25.172.in-addr.arpa 
                      26.172.in-addr.arpa 
                      27.172.in-addr.arpa 
                      28.172.in-addr.arpa 
                      29.172.in-addr.arpa 
                      30.172.in-addr.arpa 
                      31.172.in-addr.arpa 
                      corp                
                      d.f.ip6.arpa        
                      home                
                      internal            
                      intranet            
                      lan                 
                      local               
                      private             
                      test                

Link 2 (enp2s0)
      Current Scopes: DNS          
DefaultRoute setting: yes          
       LLMNR setting: yes          
MulticastDNS setting: no           
  DNSOverTLS setting: no           
      DNSSEC setting: no           
    DNSSEC supported: no           
  Current DNS Server: 192.168.178.1
         DNS Servers: 192.168.178.1
          DNS Domain: ~.           
                      fritz.box   

One more info maybe: I was using a WLAN stick for roughly one week and didn't have such issues. Long DNS times occured only with LAN:

Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 
           IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: d8:cb:8a:e8:e9:99 

I opened another thread here some weeks ago Internet sites are loading slowly sometimes with Firefox and Chromium.

The solution helped to improve the loading speed in general, but I still have the (minor) issue that sporadically websites take some seconds to start loading. In chromium I then see the message "Resolve Host" (Host auflösen in German) on the left bottom. That's why I think it could be due a DNS issue, but all tests we did in the other thread show that everything seems to be fine. I tried the Ubuntustudio live image and it seems to work without issues there, although I only could test it with Firefox which is not showing me that message.

My PC is connected via LAN to a Fritzbox repeater (1750E) and that one is connected by WLAN to another one which finally connects to the Fritzbox by WLAN. All routers are meshed and all my other devices works fine.

The issue occurs more often after diretly starting the PC. If website A has problems with resolving the host name and it finally loads after some seconds, the second time I load the site it works immediately which may be points to a DNS cache issue (?). I even get it sometimes when opening my router fritz.box site.

My Ubuntu version is: No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 20.04.1 LTS Release: 20.04 Codename: focal

Some more info:

    System:
      Host: marco-MS-7817 Kernel: 5.4.0-47-lowlatency x86_64 bits: 64 
      Desktop: Xfce 4.14.2 Distro: Ubuntu 20.04.1 LTS (Focal Fossa) 
    Machine:
      Type: Desktop Mobo: MSI model: H81M-E34 (MS-7817) v: 3.0 
      serial: <superuser/root required> BIOS: American Megatrends v: 17.5 
      date: 03/30/2015 
    CPU:
      Topology: Quad Core model: Intel Core i5-4460 bits: 64 type: MCP 
      L2 cache: 6144 KiB 
      Speed: 3200 MHz min/max: 800/3200 MHz Core speeds (MHz): 1: 3200 2: 3200 
      3: 3200 4: 3200 
    Graphics:
      Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics 
      driver: i915 v: kernel 
      Display: x11 server: X.Org 1.20.8 driver: modesetting unloaded: fbdev,vesa 
      resolution: 1920x1080~60Hz 
      OpenGL: renderer: Mesa DRI Intel HD Graphics 4600 (HSW GT2) 
      v: 4.5 Mesa 20.0.8 
    Audio:
      Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio 
      driver: snd_hda_intel 
      Device-2: BEHRINGER UMC204HD 192k type: USB driver: snd-usb-audio 
      Device-3: AKAI Professional M.I. type: USB 
      driver: hid-generic,snd-usb-audio,usbhid 
      Sound Server: ALSA v: k5.4.0-47-lowlatency 
    Network:
      Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
      driver: r8169 
      IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: d8:cb:8a:e8:e9:99 
    Drives:
      Local Storage: total: 523.08 GiB used: 159.23 GiB (30.4%) 
      ID-1: /dev/sda vendor: Samsung model: SSD 850 EVO 250GB size: 232.89 GiB 
      ID-2: /dev/sdb type: USB vendor: Samsung model: Portable SSD T5 
      size: 232.89 GiB 
      ID-3: /dev/sdc type: USB vendor: SanDisk model: Ultra size: 57.30 GiB 
    Partition:
      ID-1: / size: 36.41 GiB used: 12.45 GiB (34.2%) fs: ext4 dev: /dev/sda1 
      ID-2: /home size: 184.23 GiB used: 66.59 GiB (36.1%) fs: ext4 
      dev: /dev/sda6 
      ID-3: swap-1 size: 7.45 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda5 
    Sensors:
      System Temperatures: cpu: 41.0 C mobo: N/A 
      Fan Speeds (RPM): N/A 
    Info:
      Processes: 260 Uptime: 20m Memory: 7.23 GiB used: 3.97 GiB (54.9%) 
      Shell: bash inxi: 3.0.38 


edit:

     sudo lshw -C network
    [sudo] Passwort für marco: 
      *-network                 
           Beschreibung: Ethernet interface
           Produkt: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
           Hersteller: Realtek Semiconductor Co., Ltd.
           Physische ID: 0
           Bus-Informationen: pci@0000:02:00.0
           Logischer Name: enp2s0
           Version: 0c
           Seriennummer: d8:cb:8a:e8:e9:99
           Größe: 1Gbit/s
           Kapazität: 1Gbit/s
           Breite: 64 bits
           Takt: 33MHz
           Fähigkeiten: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
           Konfiguration: autonegotiation=on broadcast=yes driver=r8169 duplex=full firmware=rtl8168g-2_0.0.1 02/06/13 ip=192.168.178.23 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
           Ressourcen: irq:18 ioport:e000(Größe=256) memory:f7d00000-f7d00fff memory:f0000000-f0003fff

    ip a
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1492 qdisc fq_codel state UP group default qlen 1000
        link/ether d8:cb:8a:e8:e9:99 brd ff:ff:ff:ff:ff:ff
        inet 192.168.178.23/24 brd 192.168.178.255 scope global dynamic noprefixroute enp2s0
           valid_lft 862605sec preferred_lft 862605sec


  


  
-------------------------------------------------------------
@tracepath


    tracepath www.google.com
     1?: [LOCALHOST]                      pmtu 1492
     1:  fritz.box                                             7.938ms 
     1:  wpad.fritz.box                                        1.830ms 
     2:  x4db53c5a.dyn.telefonica.de                           2.639ms pmtu 1492
     2:  loopback1.0003.acln.02.fra.de.net.telefonica.de      14.828ms 
     3:  bundle-ether30.0004.dbrx.02.fra.de.net.telefonica.de  16.144ms 
     4:  bundle-ether1.0004.prrx.02.fra.de.net.telefonica.de  15.519ms 
     5:  72.14.213.76                                         16.803ms asymm 10 
     6:  keine Antwort
     7:  keine Antwort
     8:  keine Antwort
     9:  keine Antwort
    10:  keine Antwort
    11:  keine Antwort
    12:  keine Antwort
    13:  keine Antwort
    14:  keine Antwort
    15:  keine Antwort
    16:  keine Antwort
    17:  keine Antwort
    18:  keine Antwort
    19:  keine Antwort
    20:  keine Antwort
    21:  keine Antwort
    22:  keine Antwort
    23:  keine Antwort
    24:  keine Antwort
    25:  keine Antwort
    26:  keine Antwort
    27:  keine Antwort
    28:  keine Antwort
    29:  keine Antwort
    30:  keine Antwort
         Too many hops: pmtu 1492
         Resume: pmtu 1492 

--------------------------------------------------

    systemd-resolve --status
    Global
           LLMNR setting: no                  
    MulticastDNS setting: no                  
      DNSOverTLS setting: no                  
          DNSSEC setting: no                  
        DNSSEC supported: no                  
              DNS Domain: fritz.box           
              DNSSEC NTA: 10.in-addr.arpa     
                          16.172.in-addr.arpa 
                          168.192.in-addr.arpa
                          17.172.in-addr.arpa 
                          18.172.in-addr.arpa 
                          19.172.in-addr.arpa 
                          20.172.in-addr.arpa 
                          21.172.in-addr.arpa 
                          22.172.in-addr.arpa 
                          23.172.in-addr.arpa 
                          24.172.in-addr.arpa 
                          25.172.in-addr.arpa 
                          26.172.in-addr.arpa 
                          27.172.in-addr.arpa 
                          28.172.in-addr.arpa 
                          29.172.in-addr.arpa 
                          30.172.in-addr.arpa 
                          31.172.in-addr.arpa 
                          corp                
                          d.f.ip6.arpa        
                          home                
                          internal            
                          intranet            
                          lan                 
                          local               
                          private             
                          test                
    
    Link 2 (enp2s0)
          Current Scopes: DNS          
    DefaultRoute setting: yes          
           LLMNR setting: yes          
    MulticastDNS setting: no           
      DNSOverTLS setting: no           
          DNSSEC setting: no           
        DNSSEC supported: no           
      Current DNS Server: 192.168.178.1
             DNS Servers: 192.168.178.1
              DNS Domain: ~.           
                          fritz.box    
    lines 25-47/47 (END)
                          31.172.in-addr.arpa 
                          corp                
                          d.f.ip6.arpa        
                          home                
                          internal            
                          intranet            
                          lan                 
                          local               
                          private             
                          test                
    
    Link 2 (enp2s0)
          Current Scopes: DNS          
    DefaultRoute setting: yes          
           LLMNR setting: yes          
    MulticastDNS setting: no           
      DNSOverTLS setting: no           
          DNSSEC setting: no           
        DNSSEC supported: no           
      Current DNS Server: 192.168.178.1
             DNS Servers: 192.168.178.1
              DNS Domain: ~.           
                          fritz.box    
    ~

    ls -al /etc/resolv.conf
    lrwxrwxrwx 1 root root 29 Sep 27 22:10 /etc/resolv.conf -> ../run/resolvconf/resolv.conf

   

     cat /etc/resolv.conf
    # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
    #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
    # 127.0.0.53 is the systemd-resolved stub resolver.
    # run "systemd-resolve --status" to see details about the actual nameservers.
    
    nameserver 127.0.0.53
    search fritz.box




    dpkg -l *dnsmasq* | grep ii
    ii  dnsmasq-base     2.80-1.1ubuntu1 amd64        Small caching DNS proxy and DHCP/TFTP server

i'm on Ubuntustudio 20.4 and i'm using grsync to backup my data. This was working fine since I installed Ubuntu, but now grsync takes over 30s to start. I tried via the terminal and from the start menu with the same long loading time. I installed appmenu-gtk2-module as suggested here:

https://ubuntuforums.org/showthread.php?t=2441572

but there's no improvement. Also Chromium is starting quite slowly when starting it the first time after a boot. When starting it a second time it comes up fast. However Grsync starts always slow and this problem started maybe some weeks ago (was not using grsync for some time). I figured out that it basically affects all QT apps.

My distro:

Distributor ID: Ubuntu Description: Ubuntu 20.04.1 LTS Release: 20.04 Codename: focal

with XFCE. Does this also affect other users? If so, I likely have to wait until the bug is fixed.

On Ubunustudio sometimes sites load very slowly. This happens more often when I visit the site for the first time (e.g. looking something in google). The issue occurs in Firefox and Chromium. I already tried disabling IP6 which didn't help. Is there anything I can test beside of that? Download and upload speeds are fine, I guess it's maybe due to resolving adresses?

My system:

System:
  Host: marco-MS-7817 Kernel: 5.4.0-47-lowlatency x86_64 bits: 64 
  Desktop: Xfce 4.14.2 Distro: Ubuntu 20.04.1 LTS (Focal Fossa) 
Machine:
  Type: Desktop Mobo: MSI model: H81M-E34 (MS-7817) v: 3.0 
  serial: <superuser/root required> BIOS: American Megatrends v: 17.5 
  date: 03/30/2015 
CPU:
  Topology: Quad Core model: Intel Core i5-4460 bits: 64 type: MCP 
  L2 cache: 6144 KiB 
  Speed: 3200 MHz min/max: 800/3200 MHz Core speeds (MHz): 1: 3200 2: 3200 
  3: 3200 4: 3200 
Graphics:
  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics 
  driver: i915 v: kernel 
  Display: x11 server: X.Org 1.20.8 driver: modesetting unloaded: fbdev,vesa 
  resolution: 1920x1080~60Hz 
  OpenGL: renderer: Mesa DRI Intel HD Graphics 4600 (HSW GT2) 
  v: 4.5 Mesa 20.0.8 
Audio:
  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio 
  driver: snd_hda_intel 
  Device-2: BEHRINGER UMC204HD 192k type: USB driver: snd-usb-audio 
  Device-3: AKAI Professional M.I. type: USB 
  driver: hid-generic,snd-usb-audio,usbhid 
  Sound Server: ALSA v: k5.4.0-47-lowlatency 
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  driver: r8169 
  IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: d8:cb:8a:e8:e9:99 
Drives:
  Local Storage: total: 523.08 GiB used: 159.23 GiB (30.4%) 
  ID-1: /dev/sda vendor: Samsung model: SSD 850 EVO 250GB size: 232.89 GiB 
  ID-2: /dev/sdb type: USB vendor: Samsung model: Portable SSD T5 
  size: 232.89 GiB 
  ID-3: /dev/sdc type: USB vendor: SanDisk model: Ultra size: 57.30 GiB 
Partition:
  ID-1: / size: 36.41 GiB used: 12.45 GiB (34.2%) fs: ext4 dev: /dev/sda1 
  ID-2: /home size: 184.23 GiB used: 66.59 GiB (36.1%) fs: ext4 
  dev: /dev/sda6 
  ID-3: swap-1 size: 7.45 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda5 
Sensors:
  System Temperatures: cpu: 41.0 C mobo: N/A 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 260 Uptime: 20m Memory: 7.23 GiB used: 3.97 GiB (54.9%) 
  Shell: bash inxi: 3.0.38 

edit:

 sudo lshw -C network
[sudo] Passwort für marco: 
  *-network                 
       Beschreibung: Ethernet interface
       Produkt: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       Hersteller: Realtek Semiconductor Co., Ltd.
       Physische ID: 0
       Bus-Informationen: pci@0000:02:00.0
       Logischer Name: enp2s0
       Version: 0c
       Seriennummer: d8:cb:8a:e8:e9:99
       Größe: 1Gbit/s
       Kapazität: 1Gbit/s
       Breite: 64 bits
       Takt: 33MHz
       Fähigkeiten: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       Konfiguration: autonegotiation=on broadcast=yes driver=r8169 duplex=full firmware=rtl8168g-2_0.0.1 02/06/13 ip=192.168.178.23 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
       Ressourcen: irq:18 ioport:e000(Größe=256) memory:f7d00000-f7d00fff memory:f0000000-f0003fff

ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether d8:cb:8a:e8:e9:99 brd ff:ff:ff:ff:ff:ff
    inet 192.168.178.23/24 brd 192.168.178.255 scope global dynamic noprefixroute enp2s0
       valid_lft 862605sec preferred_lft 862605sec

@tracepath

When I execute it I'll get 1500 in the beginning, but the second time I get 1492, which seems to be the better value. Maybe this explains why I get issues sometimes when I first try to load a page. Where can I set MTU to 1492 permanently?

tracepath www.google.com
 1?: [LOCALHOST]                      pmtu 1500
 1:  fritz.box                                             7.938ms 
 1:  wpad.fritz.box                                        1.830ms 
 2:  x4db53c5a.dyn.telefonica.de                           2.639ms pmtu 1492
 2:  loopback1.0003.acln.02.fra.de.net.telefonica.de      14.828ms 
 3:  bundle-ether30.0004.dbrx.02.fra.de.net.telefonica.de  16.144ms 
 4:  bundle-ether1.0004.prrx.02.fra.de.net.telefonica.de  15.519ms 
 5:  72.14.213.76                                         16.803ms asymm 10 
 6:  keine Antwort
 7:  keine Antwort
 8:  keine Antwort
 9:  keine Antwort
10:  keine Antwort
11:  keine Antwort
12:  keine Antwort
13:  keine Antwort
14:  keine Antwort
15:  keine Antwort
16:  keine Antwort
17:  keine Antwort
18:  keine Antwort
19:  keine Antwort
20:  keine Antwort
21:  keine Antwort
22:  keine Antwort
23:  keine Antwort
24:  keine Antwort
25:  keine Antwort
26:  keine Antwort
27:  keine Antwort
28:  keine Antwort
29:  keine Antwort
30:  keine Antwort
     Too many hops: pmtu 1492
     Resume: pmtu 1492 

more info added on 28th september ....

link to image file with MTU settings: https://imgur.com/AOiPxjE.png

systemd-resolve --status
Global
       LLMNR setting: no                  
MulticastDNS setting: no                  
  DNSOverTLS setting: no                  
      DNSSEC setting: no                  
    DNSSEC supported: no                  
          DNS Domain: fritz.box           
          DNSSEC NTA: 10.in-addr.arpa     
                      16.172.in-addr.arpa 
                      168.192.in-addr.arpa
                      17.172.in-addr.arpa 
                      18.172.in-addr.arpa 
                      19.172.in-addr.arpa 
                      20.172.in-addr.arpa 
                      21.172.in-addr.arpa 
                      22.172.in-addr.arpa 
                      23.172.in-addr.arpa 
                      24.172.in-addr.arpa 
                      25.172.in-addr.arpa 
                      26.172.in-addr.arpa 
                      27.172.in-addr.arpa 
                      28.172.in-addr.arpa 
                      29.172.in-addr.arpa 
                      30.172.in-addr.arpa 
                      31.172.in-addr.arpa 
                      corp                
                      d.f.ip6.arpa        
                      home                
                      internal            
                      intranet            
                      lan                 
                      local               
                      private             
                      test                

Link 2 (enp2s0)
      Current Scopes: DNS          
DefaultRoute setting: yes          
       LLMNR setting: yes          
MulticastDNS setting: no           
  DNSOverTLS setting: no           
      DNSSEC setting: no           
    DNSSEC supported: no           
  Current DNS Server: 192.168.178.1
         DNS Servers: 192.168.178.1
          DNS Domain: ~.           
                      fritz.box    
lines 25-47/47 (END)
                      31.172.in-addr.arpa 
                      corp                
                      d.f.ip6.arpa        
                      home                
                      internal            
                      intranet            
                      lan                 
                      local               
                      private             
                      test                

Link 2 (enp2s0)
      Current Scopes: DNS          
DefaultRoute setting: yes          
       LLMNR setting: yes          
MulticastDNS setting: no           
  DNSOverTLS setting: no           
      DNSSEC setting: no           
    DNSSEC supported: no           
  Current DNS Server: 192.168.178.1
         DNS Servers: 192.168.178.1
          DNS Domain: ~.           
                      fritz.box    
~

ls -al /etc/resolv.conf
lrwxrwxrwx 1 root root 29 Sep 27 22:10 /etc/resolv.conf -> ../run/resolvconf/resolv.conf



 cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.

nameserver 127.0.0.53
search fritz.box




dpkg -l *dnsmasq* | grep ii
ii  dnsmasq-base     2.80-1.1ubuntu1 amd64        Small caching DNS proxy and DHCP/TFTP server

I'm on Linux since 2014 with KXStudio and went to Debian after a while. Now I'm back on Ubuntu (Studio) and I'm really happy how smooth everything works. I got a system crash two months ago with Debian and I don't know the reason. After I installed Ubuntustudio I had no problems, but today there was a 30s delay when rebooting my machine. In the journal I have some entries with the relevant delay (see below). Am I right that the delay is due to a network error?

Sep 18 16:29:23 marco-MS-7817 snapd[713]: autorefresh.go:385:

Or is there any other log file I can check to see what caused that gap? When the system paused I saw the message from fsck on the screen that some things on sda1 got cleaned. I just want to make sure that I don't have an issue with my SSD or so. On the other hand I got this messages also on 11.9. with no delay (see at the bottom).

Thanks in advance Marco

Sep 18 16:29:05 marco-MS-7817 root[1048]: Ubuntustudio Controls: Set no_turbo 1
Sep 18 16:29:05 marco-MS-7817 ubuntustudio[1051]: 1
Sep 18 16:29:05 marco-MS-7817 root[1053]: Ubuntustudio Controls: 0
Sep 18 16:29:05 marco-MS-7817 root[1054]: Ubuntustudio Controls: Using performance governor
Sep 18 16:29:05 marco-MS-7817 root[1055]: Ubuntustudio Controls: setting performance for /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
Sep 18 16:29:05 marco-MS-7817 root[1056]: Ubuntustudio Controls: setting performance for /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
Sep 18 16:29:05 marco-MS-7817 root[1057]: Ubuntustudio Controls: setting performance for /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
Sep 18 16:29:05 marco-MS-7817 root[1058]: Ubuntustudio Controls: setting performance for /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
Sep 18 16:29:05 marco-MS-7817 root[1059]: Ubuntustudio Controls: Governor set finished
Sep 18 16:29:23 marco-MS-7817 snapd[713]: autorefresh.go:385: Cannot prepare auto-refresh change due to a permanent network error: persistent network error: Get https://api.snapcraft.io/api/v1/snaps/assertions/snap-declaration/16/XKEcBqPM06H1Z7zGOdG5fbICuf8NWK5R?max-for>
Sep 18 16:29:25 marco-MS-7817 systemd[1]: Started Snap Daemon.
Sep 18 16:29:25 marco-MS-7817 systemd[1]: plymouth-start.service: Succeeded.
Sep 18 16:29:25 marco-MS-7817 systemd[1]: fstrim.service: Succeeded.
Sep 18 16:29:25 marco-MS-7817 systemd[1]: Finished Discard unused blocks on filesystems from /etc/fstab.
Sep 18 16:29:25 marco-MS-7817 systemd[1]: ondemand.service: Succeeded.
Sep 18 16:29:25 marco-MS-7817 systemd[1]: man-db.service: Succeeded.
Sep 18 16:29:25 marco-MS-7817 systemd[1]: Finished Daily man-db regeneration.
Sep 18 16:29:25 marco-MS-7817 systemd[1]: Finished Network Manager Wait Online.
Sep 18 16:29:25 marco-MS-7817 systemd[1]: plymouth-quit-wait.service: Succeeded.
Sep 18 16:29:25 marco-MS-7817 systemd[1]: Finished Hold until boot process finishes up.
Sep 18 16:29:25 marco-MS-7817 systemd[1]: Received SIGRTMIN+21 from PID 359 (n/a).

Sep 11 15:32:11 marco-MS-7817 systemd[1036]: pulseaudio.service: Succeeded.
Sep 11 15:32:18 marco-MS-7817 systemd-resolved[630]: Using degraded feature set (UDP) for DNS server 192.168.178.1.
Sep 11 15:32:20 marco-MS-7817 systemd[1]: NetworkManager-dispatcher.service: Succeeded.
Sep 11 15:32:29 marco-MS-7817 snapd[758]: autorefresh.go:385: Cannot prepare auto-refresh change due to a permanent network error: persistent network error: Get https://api.snapcraft.io/api/v1/snaps/assertions/snap-declaration/16/XKEcBqPM06H1Z7zGOdG5fbICuf8NWK5R?max-for>
Sep 11 15:32:30 marco-MS-7817 snapd[758]: storehelpers.go:438: cannot refresh: snap has no updates available: "core18", "gnome-3-34-1804", "gtk-common-themes", "snap-store", "snapd"
Sep 11 15:32:31 marco-MS-7817 snapd[758]: stateengine.go:150: state ensure error: persistent network error: Get https://api.snapcraft.io/api/v1/snaps/assertions/snap-declaration/16/XKEcBqPM06H1Z7zGOdG5fbICuf8NWK5R?max-format=4: dial tcp: lookup api.snapcraft.io: Tempora>
Sep 11 15:32:31 marco-MS-7817 dbus-daemon[707]: [system] Failed to activate service 'org.bluez': timed out (service_start_timeout=25000ms)
Sep 11 15:32:34 marco-MS-7817 lightdm[1126]: pam_unix(lightdm:auth): Couldn't open /etc/securetty: No such file or directory