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Martin Hope
Stormlord
Asked: 2024-08-05 08:19:36 +0800 CST
  • 6

Currently I'm using a wireless keyboard/mouse set and both are communicating with the system through a small usb receiver.

I'd like to replace them with a new wired set made by a different brand. The new keyboard will be connected to a usb port on the computer and the mouse will be connected to the keyboard since the keyboard is equipped with two usb ports.

I guess that since both the current and the new sets are plug'n'play, the only thing I need to do is just disconnect the current set and connect the new one and everything will work as expected. Is this correct or is there any chance the system is going to face any problems when I switch it back on and it detects this new hardware?

Thank you.

usb
Martin Hope
Stormlord
Asked: 2024-04-11 04:41:23 +0800 CST
  • 7

All the systems that are facing the following issue are running Xubuntu 22.04.4 LTS.

I am using the following command to connect to samba shares:

sudo mount.cifs //192.168.../shareName mountPath -o rw,vers=default,uid=1000,forceuid,gid=1000,forcegid,username="username",password="password" --verbose

This command used to work flawlessly before the latest 6.5.0-27-generic kernel update.

Now, although it creates a successful connection, whenever I'm accessing files from the client computer's thunar I see at least a dozen messages like the ones below, in the server's journal.log:

pam_unix(samba:session): session opened for user xxxxxxx(uid=xxx) by (uid=0)
pam_unix(samba:session): session closed for user xxxxxxx

The samba session is closed and reopened continuously for as long as I keep accessing files from the client computer.

Also, the following message appeared on the client computer's journal.log once:

CIFS: reconnect tcon failed rc=-11

The messages above do not appear if I make the initial share connection using thunar instead of mount.cifs.

How can this be fixed please?
Thank you.

kernel
Martin Hope
Stormlord
Asked: 2024-01-06 02:32:23 +0800 CST
  • 9

As we all know, the command we use in order to install multiple packages is:

apt install package1 package2 package3`

Using the following method in a Bash script:

packages="package1 package2 package3"
apt install "$packages"

produces an error saying that the package cannot be located. Therefore it's incorrect.

Does the following command run apt once for each package or does it work differently?

apt install $(cat $packageFile)

assuming that packageFile is a text file containing the package names one per line.

I know that I can use an array and place all package names in it and then use a for loop to run apt once for each package, but I'm wondering if there's a way to install all of them, using a Bash script, running apt only once.

Thank you.

command-line
Martin Hope
Stormlord
Asked: 2022-02-26 04:10:03 +0800 CST
  • 2

Sometimes I use mpv to play .mpd files. These are either local or streamed files. When the playback starts, mpv detects the highest video resolution and audio quality and starts using them.

For example, this is what appears in the terminal window when connecting to a streamed .mpd file:

     Video --vid=1 'bitrate 499950' (h264 640x360 600.000fps)
     Video --vid=2 'bitrate 999965' (h264 768x432 600.000fps)
     Video --vid=3 'bitrate 1999931' (h264 1280x720 600.000fps)
     Video --vid=4 'bitrate 2999896' (h264 1920x1080 600.000fps)
 (+) Video --vid=5 'bitrate 3999862' (h264 1920x1080 600.000fps)
     Audio --aid=1 'bitrate 96000' (aac 2ch 48000Hz)
     Audio --aid=2 'bitrate 128000' (aac 2ch 48000Hz)
     Audio --aid=3 'bitrate 192000' (aac 2ch 48000Hz)
     Audio --aid=4 'bitrate 256000' (aac 2ch 48000Hz)
 (+) Audio --aid=5 'bitrate 320000' (aac 2ch 48000Hz)
Using hardware decoding (vaapi).
AO: [pulse] 48000Hz stereo 2ch float
VO: [gpu] 1920x1080 vaapi[nv12]
AV: 00:00:13 / 01:36:50 (0%) A-V:  0.000 Dropped: 1 Cache: 61s/33MB

The plus sign shows the automatically selected video and audio.

Is there any way or command to tell mpv to use specific video resolutions and audio qualities instead of the automatically detected ones?

Thank you.

mpv-media-player
Martin Hope
Stormlord
Asked: 2021-10-14 00:47:19 +0800 CST
  • 5

It seems that youtube-dl is dead in the water since June 6, 2021 and it has reached a point where it cannot handle YouTube's downloading speed throttling at all.

  1. Does anyone know what has happened or will happen with it?
  2. What about yt-dlp? Is it safe to switch to it? One of the reasons I'm asking this question is that it is not included in the official repos at all, whereas youtube-dl is.

Thank you.

youtube-dl
Martin Hope
Stormlord
Asked: 2021-02-13 10:17:55 +0800 CST
  • 1

I installed pulseeffects recently in order to use its equalizer.

It works ok except for one thing. Sometimes, when I start an audio file (by pressing play on vlc for example) for the first time, the sound starts and stops a couple of times on each stereo channel, and then it continues playing ok. If I press Stop to stop the playback and start the file again, everything works correctly.

Does anyone know why this happens and how it can be stopped so that media files play correctly from the first time?

Thank you!

Update 1
It looks like this problem appears when using vlc only. Audio coming from mpv or Chrome sounds OK from the first time.

I tried changing automatic to pulseaudio on the output module setting on vlc to no avail. Any ideas please?

sound
Martin Hope
Stormlord
Asked: 2021-01-07 04:49:23 +0800 CST
  • 2

I am using Xubuntu 20.04.1. Kernel: 5.4.0-59.

The January 06, 2021 updates included video drivers, mesa and drm updates that are now causing the following repetitive errors in Chrome://gpu (Chrome 87.0.4280.88)

WARNING:angle_platform_impl.cc(48)] : ProgramGL.cpp:990 (checkLinkStatus): Program link or binary loading failed with no info log.
ERROR:shared_context_state.cc(74)] : Skia shader compilation error ------------------------ Errors:

Do we know anything about them please?

google-chrome
Martin Hope
Stormlord
Asked: 2020-11-16 02:50:18 +0800 CST
  • 4

How can I reroute a program's output to a dialog window instead of stdout or stderr using bash?

I don't want to capture that output to a variable by using variable=$(appname) and display it afterwards by using dialog --msgbox. I want to have something like a runtime rerouting so that the program's output is displayed in that dialog window as it is generated. Not after it's finished.

Is that possible?

Thank you!

bash dialog
Martin Hope
Stormlord
Asked: 2020-07-12 22:48:58 +0800 CST
  • 1

I am using both Xubuntu and Kubuntu 20.04.

When I edit grub and add number 3 at the end of the line starting with linux, I start the system in console mode for that one time only. The problem is that the console output is displayed on TTY2, whereas the system switches to TTY1 when using number 3. Each time I use 3, I am forced to type Ctrl-Alt-F2 in order to switch to TTY2.

Can this switching be made programmatically by adding another command to grub or by doing something else so that I don't have to type Ctrl-Alt-F2 every time I use console mode?

Thank you.

grub2 tty
Martin Hope
Stormlord
Asked: 2020-06-16 04:37:12 +0800 CST
  • 1

I have read other posts that address the problem of excessive RAM usage for buffering, during huge file transfers. I know about nocache etc.

What I'd like to ask is whether there's a way to actually define a certain buffer size, for example 1G, for file transfers, so that the system would never exceed it under any circumstances, no matter what app we use to actually do those transfers. I think that using no buffer at all is not the best thing we could do.

A preset system-wide buffer size so that we can use any File Manager for file transferring would be great. Can this be done?

cache filemanager transfer
Martin Hope
Stormlord
Asked: 2018-06-22 02:08:56 +0800 CST
  • 12

I am trying to disable automatic update checks on Kubuntu 18.04. I have unticked the option to check for updates daily by using Settings -> Configure Software Sources -> Updates in muon but the system keeps checking for updates on every startup.

The contents of /etc/apt/apt.conf.d/10periodic are

APT::Periodic::Update-Package-Lists "0";
APT::Periodic::Download-Upgradeable-Packages "0";
APT::Periodic::AutocleanInterval "0";
APT::Periodic::Unattended-Upgrade "0";

Is there anything else that has to be done in order to stop those automatic checks completely?

updates kubuntu 18.04
Martin Hope
Stormlord
Asked: 2018-06-08 21:54:55 +0800 CST
  • 2

I have a new Kubuntu 18.04 installation which was done from scratch, which normally works ok. What I have noticed though, is that whenever certain updates cause a ureadahead reconfiguration on next reboot, when that next reboot takes place, the system cannot use IPV6 at all for some reason. ping -6 -nc5 www.google.com for example produces a Network is unreachable error.

I have created my own ethernet connection profile on Network Connections where IPV4 connection is Manual and IPV6 is Automatic. IPV4 connectivity works ok every time, whereas IPV6 is facing the problem I mentioned above.

If I restart the system at that point, everything goes back to normal and IPV6 connectivity is fully restored.

Any ideas please?

networking kubuntu network-manager
Martin Hope
Stormlord
Asked: 2017-03-04 08:32:22 +0800 CST
  • 6

24 hours ago, Linux kernel 4.4.0-65 appeared as an update on Ubuntu 16.04 update servers. I did not do the update at that time because I was too busy to restart the system because of the update. I attempted to do the update 12 hours ago though and although all other updates appeared and installed properly, the kernel update had vanished.

Kernel 4.4.0-65 update is still nowhere to be found at this time. I have changed update servers just to ensure that this was not a local server issue but the results were the same.

Does anyone know what has happened?

Thank you!

kernel
Martin Hope
Stormlord
Asked: 2017-03-02 14:26:38 +0800 CST
  • 4

I used apt-get install xserver-xorg-hwe-16.04 and upgraded my Xubuntu system to use the HWE packages. The result was very disappointing since the system was taking much too long to start and it froze right after the user password was entered.

I purged all kernel 4.8 relevant packages and the system seems to be back to normal.

My question is, what do I do with the xserver HWE packages? Do I have to go back to the normal xserver-xorg packages or is it ok to leave the xserver HWE packages installed? I can see they work ok with kernel 4.4 now but will they work ok with kernel 4.4 in the future when new updates arrive?

Thank you!

xorg
Martin Hope
Stormlord
Asked: 2016-07-23 17:15:02 +0800 CST
  • 2

Ever since I installed Xubuntu 16.04, these error messages appear from time to time on syslog. It doesn't happen very often but I'd like to know if there's a fix for that.

Thank you!

iwl4965 0000:03:00.0: Microcode SW error detected.  Restarting 0x82000000.
iwl4965 0000:03:00.0: Loaded firmware version: 228.61.2.24
iwl4965 0000:03:00.0: Start IWL Error Log Dump:
iwl4965 0000:03:00.0: Status: 0x0002B3E4, count: 5
iwl4965 0000:03:00.0: Desc                                  Time       data1      data2      line
iwl4965 0000:03:00.0: NMI_INTERRUPT_WDG            (0x0004) 3043856388 0x00000002 0x02430000 208
iwl4965 0000:03:00.0: pc      blink1  blink2  ilink1  ilink2  hcmd
iwl4965 0000:03:00.0: 0x0046C 0x02F3E 0x004C2 0x006DE 0x02FAA 0x0001C
iwl4965 0000:03:00.0: FH register values:
iwl4965 0000:03:00.0:       FH49_RSCSR_CHNL0_STTS_WPTR_REG: 0X0341b800
iwl4965 0000:03:00.0:      FH49_RSCSR_CHNL0_RBDCB_BASE_REG: 0X00340c90
iwl4965 0000:03:00.0:                FH49_RSCSR_CHNL0_WPTR: 0X000000b0
iwl4965 0000:03:00.0:       FH49_MEM_RCSR_CHNL0_CONFIG_REG: 0X80809000
iwl4965 0000:03:00.0:        FH49_MEM_RSSR_SHARED_CTRL_REG: 0X0000003c
iwl4965 0000:03:00.0:          FH49_MEM_RSSR_RX_STATUS_REG: 0X02430000
iwl4965 0000:03:00.0:   FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
iwl4965 0000:03:00.0:              FH49_TSSR_TX_STATUS_REG: 0X07ff0002
iwl4965 0000:03:00.0:               FH49_TSSR_TX_ERROR_REG: 0X00000000
iwl4965 0000:03:00.0: Can't stop Rx DMA.
ieee80211 phy0: Hardware restart was requested

Wifi adapter details:

03:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)
    Subsystem: Intel Corporation Lenovo ThinkPad T61
    Kernel driver in use: iwl4965
    Kernel modules: iwl4965

Up to this date, I have found no answer to this issue. Can anybody help?

microcode
Martin Hope
Stormlord
Asked: 2016-06-23 08:00:33 +0800 CST
  • 6

While Android emulator was responding exactly as it should on Xubuntu 14.04, this is not the case on 16.04. I have already posted a question/bug report on Android developers' site but have received no answer for two months.

Is anyone else facing the same problem? Has anyone solved it somehow?

Thank you!

p.s. Please do not suggest using other emulators. The question is very precise. I want to fix this Android emulator issue specifically.

android-emulator