raisa_'s questions

• Ubuntu 22.04.4 LTS
• Kernel : Linux 6.5.0-28-generic
• Gnome version: 42.9
• Windowing system: X11

I am experiencing another terminal lag with Ubuntu 22.04. Typing is always 1 character late and I am suffering from so many typo in my code due to this issue. System is not lagging, only terminal. My experience is exactly similar with the lag issue due to libmutter from last month as mentioned in this thread : input delay on Terminal Ubuntu 22.04.4, and the solution was :

sudo add-apt-repository ppa:vanvugt/mutter
sudo apt update && sudo apt upgrade

In fact, my terminal was lagging as well last month, I followed the solution above and it worked well. A few days ago I received kernel update and recently my terminal started to lag again. List of two latest kernels :

dpkg --list | grep linux-image
linux-image-6.5.0-28-generic    6.5.0-28.29~22.04.1     Generic Linux kernel image (running)
linux-image-generic-hwe-22.04   6.5.0.28.29~22.04.1     Signed kernel image generic

I tried with the same solution as before and also tried to reinstall libmutter but it did not work anymore. When I tried to boot to the other kernel, only 6.5.0-28-generic is listed in boot options. I couldn't keep track what other packages were upgraded this past month. Any suggestions on how to investigate this issue ?

[Update]

I have confirmed from Ubuntu Bugs Launchpad that the same repeating issue with terminal lag is currently affecting other people as well. Again, it is due to libmutter update that apparently was implemented without the fix.

Machine       : ASUS X550VX
System        : Ubuntu 22.04
Kernel        : 5.15.0-40-generic
Wireless Card : Realtek RTL8723BE

Suddenly my wifi is gone and there is no option to turn it on, it says "No wifi adapter found". It was just fine before, I didn't mess with any network settings and it's been 2 days now that my wifi isn't working. There has been no luck with update from apt update and apt dist-upgrade.

Information regarding my system :

ifconfig -a (wifi is not even listed)

ifconfig -a                                                                                         
enp4s0f1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 88:d7:f6:2f:85:a6  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 35160  bytes 2601514 (2.6 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 35160  bytes 2601514 (2.6 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

usb0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.45.57  netmask 255.255.255.0  broadcast 192.168.45.255
        inet6 fe80::2455:ca2b:5322:97a0  prefixlen 64  scopeid 0x20<link>
        ether ce:ce:11:66:e8:3e  txqueuelen 1000  (Ethernet)
        RX packets 72442  bytes 97471754 (97.4 MB)
        RX errors 1  dropped 0  overruns 0  frame 1
        TX packets 31739  bytes 3779696 (3.7 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

sudo lshw -c network

sudo lshw -c network                                                                                  
      *-network UNCLAIMED       
           description: Network controller
           product: RTL8723BE PCIe Wireless Network Adapter
           vendor: Realtek Semiconductor Co., Ltd.
           physical id: 0
           bus info: pci@0000:03:00.0
           version: 00
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress cap_list
           configuration: latency=0
           resources: ioport:d000(size=256) memory:ef200000-ef203fff
      *-network
           description: Ethernet interface
           product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
           vendor: Realtek Semiconductor Co., Ltd.
           physical id: 0.1
           bus info: pci@0000:04:00.1
           logical name: enp4s0f1
           version: 12
           serial: 88:d7:f6:2f:85:a6
           capacity: 1Gbit/s
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
           configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=5.15.0-40-generic firmware=rtl8411-2_0.0.1 07/08/13 latency=0 link=no multicast=yes port=twisted pair
           resources: irq:19 ioport:c000(size=256) memory:ef114000-ef114fff memory:ef110000-ef113fff
      *-network
           description: Ethernet interface
           physical id: b
           bus info: usb@1:5
           logical name: usb0
           serial: ce:ce:11:66:e8:3e
           capabilities: ethernet physical
           configuration: autonegotiation=off broadcast=yes driver=rndis_host driverversion=5.15.0-40-generic duplex=half firmware=RNDIS device ip=192.168.45.57 link=yes multicast=yes port=twisted pair

rfkill list all

rfkill list all                                                                                  
0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

lspci -nnk | grep Net

lspci -nnk | grep Net                                                                             
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
    Subsystem: Lite-On Communications Inc RTL8723BE PCIe Wireless Network Adapter [11ad:8723]

What I have tried (with many reboots) :

1. rfkill unblock all
2. sudo apt reinstall network-manager && sudo service network-manager restart
3. sudo snap install network-manager (installing network manager via snap)
4. Installing iwlwifi following this thread : No WiFi Adapter Found with fresh Ubuntu 20.04 install on MSI GE66 Laptop, and other strange behavior
5. Installing driver for RTL8723BE from git clone https://github.com/lwfinger/rtw88.git

All with no luck then I found some interesting information :

    sudo dmesg | grep rtl                                                                           
    [    5.510743] rtlwifi: disagrees about version of symbol ieee80211_connection_loss
    [    5.510746] rtlwifi: Unknown symbol ieee80211_connection_loss (err -22)
    [    5.510926] rtlwifi: disagrees about version of symbol ieee80211_start_tx_ba_session
    [    5.510928] rtlwifi: Unknown symbol ieee80211_start_tx_ba_session (err -22)
    [    5.510938] rtlwifi: disagrees about version of symbol ieee80211_rate_control_unregister
    [    5.510939] rtlwifi: Unknown symbol ieee80211_rate_control_unregister (err -22)
    [    5.510949] rtlwifi: disagrees about version of symbol ieee80211_get_hdrlen_from_skb
    [    5.510950] rtlwifi: Unknown symbol ieee80211_get_hdrlen_from_skb (err -22)
    [    5.510964] rtlwifi: disagrees about version of symbol ieee80211_find_sta
    [    5.510965] rtlwifi: Unknown symbol ieee80211_find_sta (err -22)
    [    5.510972] rtlwifi: disagrees about version of symbol ieee80211_tx_status_irqsafe
    [    5.510973] rtlwifi: Unknown symbol ieee80211_tx_status_irqsafe (err -22)
    [    5.510985] rtlwifi: disagrees about version of symbol cfg80211_put_bss
    [    5.510987] rtlwifi: Unknown symbol cfg80211_put_bss (err -22)
    [    5.510995] rtlwifi: disagrees about version of symbol ieee80211_stop_tx_ba_cb_irqsafe
    [    5.510997] rtlwifi: Unknown symbol ieee80211_stop_tx_ba_cb_irqsafe (err -22)
    [    5.511003] rtlwifi: disagrees about version of symbol wiphy_to_ieee80211_hw
    [    5.511004] rtlwifi: Unknown symbol wiphy_to_ieee80211_hw (err -22)
    [    5.511015] rtlwifi: disagrees about version of symbol wiphy_apply_custom_regulatory
    [    5.511016] rtlwifi: Unknown symbol wiphy_apply_custom_regulatory (err -22)
    [    5.511022] rtlwifi: disagrees about version of symbol ieee80211_rate_control_register
    [    5.511023] rtlwifi: Unknown symbol ieee80211_rate_control_register (err -22)
    [    5.511033] rtlwifi: disagrees about version of symbol cfg80211_get_bss
    [    5.511034] rtlwifi: Unknown symbol cfg80211_get_bss (err -22)
    [    5.511051] rtlwifi: disagrees about version of symbol wiphy_rfkill_set_hw_state_reason
    [    5.511053] rtlwifi: Unknown symbol wiphy_rfkill_set_hw_state_reason (err -22)
    [    5.511058] rtlwifi: disagrees about version of symbol wiphy_rfkill_start_polling
    [    5.511060] rtlwifi: Unknown symbol wiphy_rfkill_start_polling (err -22)
    [    5.511067] rtlwifi: disagrees about version of symbol freq_reg_info
    [    5.511068] rtlwifi: Unknown symbol freq_reg_info (err -22)
    [    5.511080] rtlwifi: disagrees about version of symbol ieee80211_resume_disconnect
    [    5.511081] rtlwifi: Unknown symbol ieee80211_resume_disconnect (err -22)
    [    5.511088] rtlwifi: disagrees about version of symbol ieee80211_beacon_get_tim
    [    5.511089] rtlwifi: Unknown symbol ieee80211_beacon_get_tim (err -22)
    [    5.511099] rtlwifi: disagrees about version of symbol cfg80211_unlink_bss
    [    5.511100] rtlwifi: Unknown symbol cfg80211_unlink_bss (err -22)
    [    5.511107] rtlwifi: disagrees about version of symbol ieee80211_rx_irqsafe
    [    5.511108] rtlwifi: Unknown symbol ieee80211_rx_irqsafe (err -22)
    [    5.939896] Bluetooth: hci0: RTL: loading rtl_bt/rtl8723b_fw.bin
    [    5.941270] Bluetooth: hci0: RTL: loading rtl_bt/rtl8723b_config.bin
    [    5.941298] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723b_config.bin failed with error -2

I don't know what else to go or to try from here, any suggestions ?

[UPDATE 02/06/2022]

Following suggestion from comments, I removed iwlwifi dan include my wireless info (gist) following My wireless/WiFi connection does not work. What information is needed to diagnose the issue?

I am trying to do Super Resolution with FFmpeg following this thread from Video Stackexchange : How do the super resolution filters in FFmpeg work ?.

SYSTEM :

1. Ubuntu 20.04
2. Nvidia 510 (verified using nvidia-smi)
3. CUDA 11.6 (verified using (nvcc --version)
4. CUDNN 8.4 (installation method and running verification following their official website)
5. Tensorflow 2.7.0 (installation method and running verification following their official website)
6. TensorRT (installed from pip3)
7. Installed zlib1g and zlib1g-dev (via apt-get)

I had to build ffmpeg with tensorflow, here's the complete settings from the tutorial :

./configure \
  --prefix="$HOME/ffmpeg_build" \
  --pkg-config-flags="--static" \
  --extra-cflags="-I$HOME/ffmpeg_build/include" \
  --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
  --extra-libs="-lpthread -lm" \
  --bindir="$HOME/bin" \
  --enable-gpl \
  --enable-gnutls \
  --enable-libass \
  --enable-libfdk-aac \
  --enable-libfreetype \
  --enable-libmp3lame \
  --enable-libopus \
  --enable-libvorbis \
  --enable-libvpx \
  --enable-libx264 \
  --enable-libx265 \
  --enable-libtensorflow \
  --enable-nonfree

ERROR : There was no error during building & installing FFmpeg from source. However, running FFmpeg (including ffmpeg --version) result in this error :

ffmpeg: Relink `/usr/local/lib/libtensorflow_framework.so.2' with `/lib/x86_64-linux-gnu/libz.so.1' for IFUNC symbol `crc32_z'
ffmpeg: symbol lookup error: ffmpeg: undefined symbol: vaSyncBuffer

Looks like it's tensorflow-related, however I have verified that tensorflow is working properly on my system. I could find nothing on Google, there's just one thread discussing exactly the same error (here), however there is still no solution as well. I am aware the error is not symlink related, but just in case this information is needed :

$ ls -l /usr/local/lib | grep "libtensor*"                          
lrwxrwxrwx   1 root    root           28 Apr 10 05:17 libtensorflow_framework.so -> libtensorflow_framework.so.2
lrwxrwxrwx   1 root    root           32 Apr 10 05:19 libtensorflow_framework.so.2 -> libtensorflow_framework.so.2.7.0
-r-xr-xr-x   1 root    root     38362936 Apr 10 05:14 libtensorflow_framework.so.2.7.0
lrwxrwxrwx   1 root    root           18 Apr 10 05:18 libtensorflow.so -> libtensorflow.so.2
lrwxrwxrwx   1 root    root           22 Apr 10 05:19 libtensorflow.so.2 -> libtensorflow.so.2.7.0
-r-xr-xr-x   1 root    root    784355912 Apr 10 05:14 libtensorflow.so.2.7.0

$ ldd /usr/local/lib/libtensorflow_framework.so.2                                                  
    linux-vdso.so.1 (0x00007ffdd598e000)
    libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fc9f93bd000)
    libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fc9f926e000)
    librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fc9f9264000)
    libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fc9f9241000)
    libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fc9f9027000)
    libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fc9f900c000)
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fc9f8e18000)
    /lib64/ld-linux-x86-64.so.2 (0x00007fc9fb31a000)

$ ls -l /lib/x86_64-linux-gnu | grep "libz.*"                                     
lrwxrwxrwx 1 root root      14 Oct 15  2020 libz.so.1 -> libz.so.1.2.11
-rw-r--r-- 1 root root  108936 Oct 15  2020 libz.so.1.2.11

$ ldd /lib/x86_64-linux-gnu/libz.so.1                                            
    linux-vdso.so.1 (0x00007ffc693bf000)
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f3935cfb000)
    /lib64/ld-linux-x86-64.so.2 (0x00007f3935f5c000) 

[UPDATE]

Error 1 is solved (see answer below). Now what remains is Error 2 :

$ ffmpeg --version
ffmpeg: symbol lookup error: ffmpeg: undefined symbol: vaSyncBuffer

Any suggestion ?

After battling errors due to pango, I finally able to log in to my machine however my top toolbar icons, apps icons, and some settings icons are missing / a mess. Here are some errors :

Top toolbar, prior to this errors, both "..." icons had fine icons each for cpufreq and redshift :

Setting icon error :

Apps icon error (Gimp). Gimp looks very bad, I can't use it properly :

I came across this question Toolbar icons and menu icons are missing everywhere in Ubuntu 20.04, which could be the same problem as mine (including GIMP icons errors), but there's no answer to the question yet. Came across this question as well Folder and file icons messed up, the solution doesn't work for me.

I have gnome-tweak-tool installed with Yaru as my theme :

According to my history log, these are packages I've tried to reinstall this past half day in an attempt to get my icons back to normal :

apt-get install --reinstall appmenu-gtk2-module appmenu-gtk3-module
apt-get install --reinstall indicator-application
apt-get install --reinstall indicator-common

apt-get remove --purge yaru-theme-icon yaru-theme-gtk yaru-theme-gnome-shell
apt-get install yaru-theme-icon
apt-get install yaru-theme-gtk
apt-get install yaru-theme-gnome-shell

Any suggestion ?

 - System  : Ubuntu 18.04
 - Printer : Canon MP287

I've spent days trying to get the best settings to get an accurate color printing. No matter what combination I used, the result is extremely different with the source file. I've come across this question Color calibrate printer/ink/paper using the integrated scanner but he was using an unstable version of Ubuntu and his solution was upgrading to the latest version of Ubuntu.

Here's comparison between original image and scanned printed result :

That was printed using Default Setting as bellow :

General
Media Size              : A4
Color Model             : RGB Color
Color Precision         : Normal
Media Type              : Plain Paper
Media Source            : Rear Tray
Print Quality           : Standard
Resolution              : Automatic
Srink page If Necessary to Fit Borders  : Shrink (print the whole page)

Printer Feature Common
CD Hub Size             : Normal
Ink Type                : CMKYK
Ink Set                 : Both
Borderless              : No
Orientation             : Portrait

Printer Feature Extra 1
CD Size (Custom)                : 116.1mm
CD Hub Size (Custom)            : 42.7mm
CD Horizontal Fine Adjustment   : 0.0mm
CD Vertical Fine Adjustment     : 0.0mm 

Output Control Common 
Color Correction                : Default
Brightness                      : 1.000
Brightness Fine Adjustment      : 0.000
Contrast                        : 1.000
Contrast Fine Adjustment        : 0.000
Saturation                      : 1.000
Saturation Fine Adjustment      : 0.000
Image Type                      : Mixed Text and Graphics

Output Control Extra 1
Density                         : None
Density Fine Adjustment         : 0.000
Dither Algorithm                : Default
Cyan Density                    : None
Cyan Density Fine Adjustment    : 0.000
Magenta Density                 : None
Magenta Density Fine Adjustment : 0.000
Yellow Density                  : None
Yellow Density Fine Adjustment  : 0.000
Black Density                   : None
Black Density Fine Adjustment   : 0.000

Output Control Extra 2
Composite Gamma                 : None
Composite Gamma Fine Adjustment : 0.000
Cyan                            : None
Cyan Fine Adjustment            : 0.000
Magenta                         : None
Magenta Fine Adjustment         : 0.000
Yellow                          : None
Yellow Fine Adjustment          : 0.000
Black                           : None
Black Fine Adjustment           : 0.000

Cyan Balance                    : None
Cyan Balance Fine Adjustment    : 0.000
Magenta Balance                 : None
Magenta Balance Fine Adjustment : 0.000
Yellow Balance                  : None
Yellow Balance Fine Adjustment  : 0.000

Output Control Extra 4
Linear Contrast Adjustment      : No

Output Control Extra 5
Light Cyan Transition                   : None
Light Cyan Transition Fine Adjustment   : 0.000
Light Magenta Transition                : None
Light Magenta Transition Fine Adjustment: 0.000
Light Yellow Transition                 : None
Light Yellow Transition Fine Adjustment : 0.000
Ink Limit                               : None
Ink Limit Fine Adjustment               : 0.000
GCR Transition                          : None
GCR Transition Fine Adjustment          : 0.000
GCR Lower Bound                         : None
GCR Lower Bound Fine Adjustment         : 0.000
GCR Upper Bound                         : None
GCR Upper Bound Fine Adjustment         : 0.000
 

I have Gutenprint installed and I have checked in

usr/local/share/gutenprint/5.2/xml/printers.xml

I saw that my printer Canon PIXMA MP287 is listed already. I also have GNOME Color Management installed in my machine but I'm not familiar with it. Is there any settings advice I can follow and apply to my current setting ?

[UPDATE]

I tried to calibrate using native printer calibration from Ubuntu. I printed it8 target, scan it back and calculate icc profile for correction, setting : Accuracy. I'm aware that setting preference to accuracy will take longer, but I have 24gb ram and it's been like this for 14 hours now. I'm just gonna cancel it.

More advice ?

[UPDATE 2]

I tried to re-calibrate using colorchecker passport. Process completed and I got a notification that my device is successfully calibrated. However, calibration result is strange.

Printing result is still as bad as non-calibrated. Still open to suggestions & advice ?

I've been using Ubuntu for more than a year now. Mostly for school assignments, and I don't use dual-boot. So I guess I quite enjoy it and I don't think I'd ever go back to my old OS.
This is about internal errors, I genuinely want to know if there's anyway I can troubleshoot this. I can say, I always get "internal error report" whenever I turn my machine on and I'd always report them, at least when I have internet connection but again I'm not blessed with 24/7 internet connection. But when I do, I always report them and check for any update as well. Just today I got this :

The left one, apparently my Java installation is causing crash, and in the error it's also written :

Unreportable reason
This package does not seem to be installed correctly

So I tried to fix my installation by running :

sudo apt install default-jre 

And it says it's already the newest version, I don't know where to go from there. Error on the right one, I don't know what it's about. I tried to looked for this issue and I came across these 2 questions :
1. Where do “internal error” error reports go?
2. How can I track a bug that caused a crash and was reported via apport / whoopsie?

But both are about error reporting (Ubuntu Error Tracking), not troubleshooting. So, I went to check my error reports and I got this :

So yes, my errors were submitted but I still encounter internal errors when I start my machine. Meanwhile waiting for any software update, is there anything we can do to troubleshoot this ourselves ? Because clearly even with update I still get these errors. Guess the updates are general ? Not specific for some reported error ? Some enlightenment or suggestion would be appreciated. Thanks !

Recently I'm installing OpenVino from scratch following this documentation : Install Intel® Distribution of OpenVINO™ toolkit for Linux* . Now after several steps, I realized that the output path specified in the documentation is different with the actual path in my machine after installation. For example :

• Documentation :

  /home/<user>/openvino_models/models/FP32/classification/squeezenet/1.1/caffe/squeezenet1.1.caffemodel
  

• Mine :

  /home/raisa/openvino_models/models/public/squeezenet1.1/squeezenet1.1.caffemodel
  

Eventhough it's in different path, the file is there and I can link it properly (for now). I'm afraid in the future this path inconsistency will cause trouble in my program, for example I'm missing about 4 directories here compared to the documentation (FP32, Classification, Squeezenet and Caffe) that I don't know if they're gonna be necessary in the future or not.

Also, for environment variable I need to either run this script everytime I execute my program, or specify it in .bashrc.

• Documentation :

  source /opt/intel/openvino/bin/setupvars.sh
  

Now, of course I can't specify that path in my .bashrc since I don't even have that path in my machine, so I put the path that I have in in my machine in .bashrc :

• Mine

  source /opt/intel/openvino_2019.3.376/bin/setupvars.sh
  

But it doesn't work. My environment is error. Even if I put the path from the documentation in .bashrc, my environment is still error. However, if I just run the script (from the documentation) right before I execute the program, it worked, eventhough I don't even have that path. How is that possible ?

I want to understand and fix this. When something like this happen, does that mean my installation is corrupt ? Do I need to reinstall ? How did this happen ?

I notice how my Ubuntu 18 boots very slow, so much slower than Windows that previously installed on the same machine. I don't use dual-boot, my machine is :

Ubuntu 18.04.3 LTS
Intel® Core™ i7-7700HQ CPU @ 2.80GHz × 8 
64-bit, NVIDIA GeForce GTX 950M

NVIDIA was quite problematic and causing boot issues, so I had to put some kernel boot parameters. Now it looks like this :

 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pci=nomsi pci=noaer
 acpi_enforce_resources=lax intel_pstate=disable acpi_osi=!Windows
 2012"

The default booting time is : 47s.

I followed suggestion from this post : How to diagnose/fix very slow boot on Ubuntu 18.04, while some answers helped other people, it doesn't work on me.

What I have tried :

1. Added noresume parameter in kernel boot. Literally from the post above, someone cut booting time by 31s !

   I upgraded to 18.04 yesterday and I had the same problem (it took 52 seconds to boot). After setting the "noresume" parameter, it took 21 seconds.

   Result : (sorry forgot to take a screenshot): 57s (10s slower). Why ?

2. Decrease time process for Network and configuring the timeout for Start Job and Stop Jobs by changing :

   /etc/systemd/system/network-online.target.wants/networking.service
   

   Change TimeoutStartSec=5min to TimeoutStartSec=5s.

   Also,

   /etc/systemd/system.conf  
   

   change :

   DefaultTimeoutStartSec=5s
   DefaultTimeoutStopSec=5s
   

   Result : Failed to boot. (Stuck at booting screen)

3. Disable Networking during booting :

   systemctl disable NetworkManager-wait-online.service
   

   Result : Booting time was 51s (4s slower).

Why did I miss from steps above ? How did my machine ended up booting slower ?
Why did noresume which was supposed to prevent resume partition makes it slower instead ? Any other advice to decrease booting time ?

UPDATE

Following suggestion from WinEunuuchs2Unix, I tried :

4. Disable networking as in step (3), and remove the journal flush service and vacuum it by changing :

   nano /etc/systemd/journald.conf
   

   change

   Storage=auto
   SystemMaxUse=50M
   SystemMaxFileSize=1G
   SystemMaxFiles=5
   

   My original journal disk usage was 2G, now it's down to 200MB. But system-journal-flush.service time doesn't seem to get faster, it's still 11s.
   Also, before changing its settings, flushing time was 3.xx s. Now it's 10.xx s instead.

Result, booting time : 52s (5s slower).

5. Disabling tor-service :

   /etc/default/tor    
   

   change to RUN_DAEMON="no" and run

   sudo systemctl disable tor.service
   

   Then added video=SVIDEO-1:d parameter to the boot kernel (following solution from : Long Kernel Boot Segment in 18.04).
   And masked systemd-journal-flush.service and the keyboard-setup.service (following solution from : Long boot time Ubuntu 18.04).

Result. Booting time : 45s. (2s faster), but I believe it can be improved.
On the second trial : 47s (no improvement).
I really thought disabling tor-service would give me 5~7s faster booting time since it originally took 10-13s in booting time.

Still confused at how noresume parameter, disabling networking and vacuum logs from journal lead to slower booting time instead. Further suggestions will be appreciated !

UPDATE 2

6. Install haveged. Booting time : 49s (2s slower)

Just why.

My notebook (with NVIDIA) is running in abnormally fast fan speed and temp. At first I thought it was the graphic card, then I installed appropriate drivers for my graphic card, still having the same issue. I came across this question about the same issue. I followed the instruction to

• instal sensor-detect
• pwmconfig to test each fan
• /etc/fancontrol to create file
• add parameter acpi_enforce_resources=lax (I also put pci=nomsi and pci=noaer already)
• disable turbo boost

However, after booting a few times, my notebook still running at crazy temperature. I tried to run sensors and this is the result :

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +54.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +51.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +53.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +51.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +52.0°C  (high = +100.0°C, crit = +100.0°C)

I literally can hear the fans running super fast, sometimes randomly when I'm not even running anything (idle). I just recently switched to Ubuntu and and still trying to figure this out. Any advice on how I can overcome this issue ?

I have modified some code from ARToolkit in MacOS and now I need to compile it with Windows subsystem (Ubuntu). I have followed the ARToolkit user manual instruction and have installed all libraries to compile with Ubuntu.

Here's my makefile :

INC_DIR= ../../include
LIB_DIR= ../../lib
BIN_DIR= .

CC=cc
LDFLAG= -L$(LIB_DIR)
LIBS= $(shell pkg-config --libs opencv) -lARgsub -lARvideo -lAR -framework GLUT -framework OpenGL -framework CoreFoundation 
CFLAG= $(shell pkg-config --cflags opencv) -O -I$(INC_DIR) -Wno-deprecated-declarations 

OBJS = SOIL2/SOIL2.o SOIL2/etc1_utils.o SOIL2/image_DXT.o SOIL2/image_helper.o
HEADDERS =

all: $(BIN_DIR)/simple $(BIN_DIR)/simple2

$(BIN_DIR)/simple: simple.o $(OBJS)
    ${CC} -o $(BIN_DIR)/simple simple.o $(OBJS) $(LDFLAG) $(LIBS)


$(BIN_DIR)/simple2: simple2.o $(OBJS)
    ${CC} -o $(BIN_DIR)/simple2 simple2.o $(OBJS) $(LDFLAG) $(LIBS)


simple.o: simple.c $(HEADDERS)
    ${CC} $(CFLAG) -c simple.c

simple2.o: simple2.c $(HEADDERS)
    ${CC} $(CFLAG) -c simple2.c

clean:
    rm -f *.o
    rm -f $(BIN_DIR)/simple
    rm -f $(BIN_DIR)/simple2

allclean:
    rm -f *.o
    rm -f $(BIN_DIR)/simple
    rm -f $(BIN_DIR)/simple2
    rm -f Makefile

Now that I can compile using makefile successfully, when I try to run my program I encountered error :

./simple: cannot execute binary file: Exec format error

Then I checked with file command :

Mach-O 64-bit x86_64 executable, flags:<NOUNDEFS|DYLDLINK|TWOLEVEL|PIE>

And my machine is this :

Linux Raisa 4.4.0-17134-Microsoft #285-Microsoft Thu Aug 30 17:31:00 PST 2018 x86_64 x86_64 x86_64 GNU/Linux

And I also have read posts here :

1. Can I run a binary file that is Mach-O executable i386 on linux? (asked in 2010)
2. What are the alternatives for running a Mach-O 64-bit binary file on a linux machine? (asked in 2017)

and basically both of them stated that there's really nothing we can do about it. Does this still apply ? This is the first time I need to switch between OS when compiling a program, and I'm not familiar with this. If I should edit part which specific part I need to modify ?