Latest Ubuntu related questions

Score: 3
Security OVAL files seem to give false positives
ph flag

I'm scanning some systems running 18.04 LTS using OpenSCAP and the Ubuntu OVAL file. The scan tells me the systems have vulnerabilities like USN-5123-1 when we haven't installed the mysql-server packages referenced in the USN on Ubuntu's site. Looking at the OVAL XML, it looks like this is because the test for that USN looks for a number of other packages, including libmysqlclient20, which we do have  ...

Score: 0
Why do I get "ioctl(VIDIOC_DQBUF): No such device" After a couple minutes of streaming my PC monitor
in flag

I am using my Raspberry PI to stream a monitor at work with real time operating details of a conveyor system. I've set up the PI with a capture card and an HDMI to DVI splitter to do so and stream using TeamViewer.

This has worked great for the past several months, but now, a few minutes after starting the stream, the video freezes and I get a repeating

[video4linux2,v4l2 @ 0xa72005f0] ioctl(VIDI ...

Score: 2
ali HOZA avatar
Does virtualization improves gaming or dual boot performance?
ua flag

In my laptop's BIOS menu there is an option named Intel (R) Virtualization Technology which can be enabled/disabled by the user.

BIOS Intel (r) Virtualization Technology option

Does this feature has any performance effects on dual booting Windows and Linux? What about gaming performance?

Score: 0
SuperLeo avatar
Ubuntu 20.04 Wifi disapears after kernel update
na flag

I have a recurrent issue with Ubuntu 20.04, which works fine otherwise. Every now and then, general updating triggers a kernel update. After rebooting, and not before, my Wifi disappears and I cannot reconnect the Wifi.

The last occurrence of the problem was when upgrading to Ubuntu with Linux 5.13.0-21-generic

My only solution so far is to reboot with an older kernel, now Ubuntu with Linux 5.11.0-4 ...

Score: 5
'Files' window doesn't show in taskbar when using Dash to Panel
cn flag

The 'Files' window doesn't show in the taskbar. Any other application will show when started but files does not. I'm running dash to panel on Ubuntu 21.10. Is there a setting I'm missing?

~$ wmctrl -m
Name: GNOME Shell
Class: N/A
PID: N/A
Window manager's "showing the desktop" mode: OFF
~$ echo $DESKTOP_SESSION $XDG_CURRENT_DESKTOP
ubuntu-xorg ubuntu:GNOME

Files window not showing in taskbar Dash to panel settings

Score: 0
MMSilva avatar
Second monitor with no signal but VGA is connected, Ubuntu 20.04.3 LTS
jp flag

I have connected a second screen through VGA, but there is no signal (the 2nd screen is black). I have tried changing the resolution of the second screen, rebooting, etc, nothing is working so far. Help?

Here's the output of xrandr:

Screen 0: minimum 320 x 200, current 2752 x 900, maximum 16384 x 16384
LVDS-1 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 345mm x 194mm
   16 ...
Score: 0
user15285808 avatar
Need help to get rid of libtorch header erros: conflicting declaration ‘constexpr const auto torch::...’
tz flag

Can't compile a simple libtorch C++ program ever since upgraded ubuntu to 21.10. Using QT Creator, tried several versions (Desktop QT 5.12.5, 5.15.2, 6.1.2, 6.2.1), both gcc & clang w/o sucess. Also tried ABI=0 libtorch version. Always getting the error: /usr/local/include/torch/csrc/api/include/torch/types.h:39: error: conflicting declaration ‘constexpr const auto torch::(kUInt8, kInt8, etc)’ A ...

Score: 1
Anitya2020 avatar
Windows not clearing after closed - Kubuntu 21.10
cn flag

I'm facing the following problem. Sometimes an application window does not clear and remains stuck in the foreground. In a short time, the entire screen is filled with images of closed applications, but still on the screen. It is not possible to work and I have to log out. Details: I'm running Kubuntu 21.10, fresh installation with Kubuntu backports from the PPA. The graphics card is an old nvidia with  ...

Score: 0
S Andrew avatar
Linux systemd service not restarting automatically?
cn flag

I have below systemd service:

[Unit]
Description=Python Code
Requisite=mosquitto.service
BindsTo=mosquitto.service

[Service]
Type=simple
User=andrew
ExecStart=/usr/bin/python3 /home/andrew/Documents/main.py
Restart=always
RestartSec=10s
StandardOutput=null

[Install]
WantedBy=multi-user.target

Above service is running fine. As mentioned above, it depends on mosquitto so if mosquitto stops, service ...

Score: 0
AlMo320 avatar
What is RTCTimeUSec shown by `timedatectl show`?
cn flag

On assorted flavors and versions of Linux, I see the following when issuing the timedatectl show command:

Timezone=America/Los_Angeles
LocalRTC=yes
CanNTP=yes
NTP=yes
NTPSynchronized=yes
TimeUSec=Mon 2021-11-22 08:33:06 PST
RTCTimeUSec=Mon 2021-11-22 00:33:06 PS

This value appears to be the local time offset by -8 hrs (my current GMT offset), which doesn't make sense to me.

I can't find any reference to  ...

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