Questions tagged [20.04]
Eighth LTS (Long Term Support) release of Ubuntu, code-named "Focal Fossa". Released on April 23, 2020. Will reach End of Standard Support (ESS) in April 2025. Only use this tag for version-specific questions.
13,703
questions
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How To Create Multiple Loopback Cards Using Alsa?
I Have A Requirement Where I Need To Create Multiple Loopback Devices In ALSA. Using The Command Below I Am Only Able To Create One Pair Of Cards:
sudo modprobe snd-aloop
How Can I Create Many Of ...
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1
answer
98
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Should I edit resolv.conf?
I am using U20 LTS, our Search Domain changed. I did change that in netplan Config but when I grep for old domain in /etc there is still the old one in resolv.conf.
In the file it says I shouldn't ...
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0
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117
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sudo apt-get update shows this messages...Unit packagekit.service not found
Failed to start esm-cache.service: Unit sysinit.target not found.
Get:1 file:/var/cudnn-local-repo-ubuntu2004-8.9.4.25 InRelease [1,572 B]
Get:1 file:/var/cudnn-local-repo-ubuntu2004-8.9.4.25 ...
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2
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141
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How do I invert tablet orientation?
I have a Zinnia Momentum MT-100 tablet that I'm trying to use on 20.04 and it works on plug and everything, the only issue is that the orientation is wrong. It's detecting horizontal inputs as ...
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350
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Two services allocated for the same bus name org.bluez
When I run sudo apt upgrade on my Ubuntu MATE 20.04, I get the following:
[various stuff]
Do you want to continue? [Y/n] y
Setting up bluez (5.53-0ubuntu3.7) ...
Failed to restart bluetooth.service: ...
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122
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Ubuntu 20.04 i3 Dark Mode
After switching to i3, the "Appearance" option is no longer available in the gnome-control-center. How do I re-set dark mode?
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166
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Grub failed to install to /dev/md0 on Ubuntu 18 to 20 upgrade
I ran do-release-upgrade on an Ubuntu 18.04 LTS server. It looked like the upgrade to 20.04 LTS was successful, but then at what I'm assuming is the end of the upgrade, I am presented with this ...
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34
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Application not getting launched from the notification list in ubuntu
I have a GTK application and I m creating the app notification for it using the Libnotify package. I have a scenario where my application triggers a notification and after the popup disappears, the ...
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44
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Ubuntu not loading GUI because of NVIDIA?
I recently encountered an issue where my operating system freezes during boot-up, displaying a specific screen. Could this be related to an NVIDIA issue?
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How to recover a Ubuntu 20.04 live usb that crashed after uninstalling python?
I have foolishly uninstalled python from my Ubuntu 20.04 live usb... Now it won't boot past a black screen offering to enter ubuntu credetials. It accepts su as user and the pre-set password.
How do ...
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How to set device by device whether audio output should switch upon connecting
Is it possible on Ubuntu 20.04 to automatically switch the sound output device for some devices and not for others?
Specifically I want to switch to some devices such as headphones but my screen for ...
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58
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SSH to ldap client hangs when ldap server is not reachable on ubuntu 20.04
I am using ubuntu 20.04 VM as ldap client and docker is my ldap server. When ldap server is not reachable ssh to ldap client vm gets hungs. Below are the auth logs
Dec 18 07:02:40 tpvm22 sshd[24790]: ...
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12
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unable to control line-in level in 20.04
I'm able to use the command pactl load-module module-loopback and the same with unload-module to toggle line-in on and off but there's no way of controlling the level Nothing I adjust in alsamixer has ...
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How can I stop Ubuntu Pro ad from showing up in apt system command? [duplicate]
Ubuntu is showing ads in system commands. How can I stop this?
I am aware of "upgrade OS to something that is not adware" as a solution.
sudo apt dist-upgrade
Reading package lists... Done
...
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35
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Ubuntu Dock Shaking
My Screen Dock is blinking like the one below. What can be the reason for this?
I have updated and upgraded my OS.
)
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1
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48
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do-realease-update aborte due to insufficient space in /var/cache/apt/archives
I want to update from 20.04 to the next lts release with do-release-upgrade utility. But the process aborted with the following message:
Not enough free disk space
The upgrade has aborted. The ...
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0
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92
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adding ipv6 addresses to loopback sub interfaces
I have Ubuntu 20.04. I have three distinct loopback interface lo:11, lo:12 and lo:13. I want to assign a unique ipv6 address to each of those loopback interfaces and advertise them with bgp(v6).
The ...
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0
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32
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Upgrade 20.04 to 22.04 - did not work
Eventually took the plunge and upgraded from 20.04 to 22.04, various reasons for holding off
because of development work.
So Started the upgrade off, all seemed to go well, but now I have
No Internet ...
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1
answer
90
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How can I download the right printer driver for my new Epson ET-4810 with ubuntu 20.04 LTS?
I am looking for VERY detailled help with the installation, because I have never done such a thing before...
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29
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Is there an Ubuntu package for Ubuntu 20.04 LTS that I can install with templates for making a 4 sided (front & back) card?
I need templates for making a 4 sided (front & back) greeting card.
I couldn't find anything looking through Synaptic package mgr or the Ubuntu Software
that came with 20.04 LTS.
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55
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Syntax to use deja-dup over network with ssh
Currently I use deja-dup to backup to a external ssd. The SSD is mounted under UbuntuBackup with folder mini. I am about to put this computer into semi-retirement. Then I would like to back up my new ...
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27
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PyQt5 QFileDialog Aborted (core dumped)
Following are the outputs of some commands.
===========================================
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.3 LTS
Release: ...
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86
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Docker start returns OCI runtime error - runc version mismatch
I am seeing a weird error on Ubuntu 20.04 when I run the docker using docker run --name <container_id>.
docker.errors.APIError: 500 Server Error: Internal Server Error
("failed to create ...
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148
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Two port NIC, one port works
I have a simple two port NIC plugged directly into an Ubuntu 20.04 computer. One port works. ip a shows one port (ENPxxB) up and one (ENPxxA) down.
Nothing I've tried (sudo ifconfig ENPxxA up or sudo ...
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89
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Why do I have intermittent Wi-Fi disconnections in Ubuntu 20.04.6?
I'm using Ubuntu 20.04.6 and have been experiencing intermittent Wi-Fi disconnections during which my Wi-Fi icon turns into a question mark.
I was able to get all the below information before my WIFI ...
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137
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How to fix extremely slow network conection - Ubuntu 20.04 LTS?
Edit below, 2023-12-12:
The issue has been resolved.
Turns out it was a browser-related problem.
After reading all the comments and trying various solutions, I went to check if the browsing speed ...
0
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1
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40
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VPS server htop shows 4 bars in 100% with yellow!
what is the yellow color means!?
is it DDos attack or something else !?
its VPS with Ubuntu 20.04 64bit from Hostinger with Cpanel installed.
all websites are down
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1
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149
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Error while checking filesystem. Not authorized to perform operation (udisks-error-quark,3)
I have been getting disk errors from an NTFS-formatted internal SATA HDD on a Lubuntu 20.04.6 LTS system. For example:
rsync: recv_generator: failed to stat "/media/WD4Tb/some-file": Input/...
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134
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I’m trying to launch rplidar but I’m getting a timeout error (reupload)
(I’m uploading this again because nobody answered the first time) I've set up ROS noetic in my Raspberry Pi 4 B with Ubuntu 20.04. I want to make a map with my LiDAR, so I started by installing ...
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42
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How to fix the desktop screen from the cui login screen
OS name: Ubuntu 20.04
After booting and displaying the Ubuntu logo, I got a black screen with a blinking cursor. After switching to the GUI login screen from the information on the net, I entered my ...
0
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1
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106
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Files in Trash are not deleted in Ubuntu 20.04
I have probably tried all the methods available on the internet including using trash-cleaner, other command prompts, and the direct clear trash from files. However, a large segment (more than 30GB) ...
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84
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How can I make all of the windows default font/window smaller? Or zoom to .90 for my entire desktop
I'm using Ubuntu 20.04 LTS, and want to make all of the fonts across all of my applications smaller (like Windows supports). For example, in Windows I could make the zoom level 125%, 150%, 200%.
The ...
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93
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Any idea how to bring back the network without netplan cmd?
There was a power-outage in our lab during the weekend, and when I was to recover one of the ubuntu server and have it booted, the network was not set automatically.
So as of now, Running "...
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1
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102
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Dual booting Ubuntu help
When trying to dual boot Ubuntu on my laptop the screen keeps going black every 10-30 seconds. It is not shutting off, when I press the keyboard keys multiple times, the screen turns on (but does not ...
0
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1
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62
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How can I restore my desktop
I am not sure what I did or what is is called, but I no longer have that bar on the bottom of my screen.
https://imgur.com/a/3fF6DYb
Can someone help me restore it ?
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307
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Troubleshooting Polkitd on Ubuntu 20.04.6 LTS
I'm not sure where to begin... I'm trying to troubleshoot an issue where on the vast number of deployed Ubuntu 20.04.6 LTS systems, users never receive a popup asking to enter their password when ...
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1
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261
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Gnome 42 installed on Snap Ubuntu 20.04
I have Ubuntu 20.04 with gnome-42-2204 installed as snap package
# snap list --all
Name Version Rev Tracking Publisher Notes
bare 1.0 ...
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1
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98
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Cannot execute commands as root following upgrade
I accepted the invitation to upgrade my Lubuntu 20.04.6 LTS machine today, and have been unable to execute commands as root ever since - for example, if I try:
sudo docker stop home-assistant
I get:
...
0
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0
answers
44
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Package held back message when upgrading ubuntu from 18.04 to 20.04
I am not able to upgrade to Ubuntu 20.04 because of the following message
The following packages have been kept back:
gce-compute-image-packages google-compute-engine-oslogin
python3-google-...
0
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1
answer
352
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sudo apt update errors on PUBKEY Ubuntu 20.04
The error states:
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repo.mysql.com/apt/ubuntu bionic ...
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0
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103
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Ubuntu-20.04 [ end Kernel panic = not syncing: Attempted to kill init! exitcode=0x00000100 ]
First, I will upload a picture right after the kernel panic appears.
This symptom occurred after upgrading to Java 1.10 while using Java 1.8 and rebooting.
Is there a way to access it somehow and ...
0
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0
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399
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ubuntu kernel panic and Problems
problem:
[0.146408] x86/cpu: UMX (outside TXT) disabled by BIOS
[0.1464111] x86/cpu: SGX disabled by BIOS.
/dev/sda6: clean, 1303675/7913472 files, 28367522/31622144 blocks
run-init: can't execute '/...
1
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2
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498
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How to grant full access to any new folders/files/subfolders created in a specific folder?
I have granted full access to a folder as follows:
sudo chmod 777 -R /media/sharedfolder
However when a new subfolder is created by User A, that subfolder is not accessible by other users. How can I ...
1
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0
answers
53
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After entering the password and hitting enter the screen is blurred
Ubuntu boots normally and reaches the login screen. After entering the password and hitting enter, screen goes blurred. Is there any way to troubleshoot this problem?
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107
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Why am I unable to run a basic CUDA program even though I have nvcc installed in my system?
Why am I unable to run a basic CUDA program even though I have nvcc installed in my system?
my_username@192:~$ nvidia-smi
Sun Dec 3 10:23:33 2023
+-----------------------------------------------------...
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1
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159
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Display Brightness Not Changing Lenovo Thinkpad T14s
The display brightness adjustment while using Ubuntu on my Thinkpad T14s (AMD CPU + iGPU) does not work.
Specifically, the brightness slider in the settings does not change the brightness of the ...
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0
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94
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Issue in nvidia-smi version and docker cuda ref in ubuntu 20.04
The issue in Ubuntu 20.04:
Issue in Cuda Version: ERR!
Issue in Cuda ref in Docker like:
cudaloader gstcudaloader.c:169:gst_cuda_load_library: Could not open library libcuda.so.1, libcuda.so.1: ...
0
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0
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25
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Error installing linux-image-5.15.0.89-generic on 20.04 [duplicate]
There are unmet dependencies. I then run:
sudo apt --fix-broken install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
...
0
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1
answer
56
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Some programs are not working after changing the motherboard
When I changed the motherboard, some programs stopped working On my Ubuntu 20.04. I didn't reinstall OS and the motherboard is nearly the same as the old one and a lot of programs are not working ...
0
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0
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201
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Run flutter application in kiosk mode
I want to know if it's possible to run a Flutter app in a Raspberry Pi, running Ubuntu.
The thing is, I need this raspberry to run only the app in fullscreen mode. I found about kiosk mode, but ...