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.

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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 ...
Hammad Fida's user avatar
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1 answer
98 views

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 ...
NASH7's user avatar
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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 ...
JS J's user avatar
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2 answers
141 views

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 ...
bimbinis's user avatar
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350 views

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: ...
Roger House's user avatar
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122 views

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?
Jonathan Woo's user avatar
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1 answer
166 views

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 ...
Curtis's user avatar
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0 answers
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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 ...
Vipul Gupta's user avatar
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44 views

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?
Nicolò Tellini's user avatar
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1 answer
78 views

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 ...
Ree Tuh's user avatar
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16 views

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 ...
Kvothe's user avatar
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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]: ...
Shaik Musthafa's user avatar
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0 answers
12 views

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 ...
fugee ohu's user avatar
2 votes
0 answers
30 views

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 ...
reducing activity's user avatar
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0 answers
35 views

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. )
L.M.A.H. PREMAWANSHA's user avatar
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1 answer
48 views

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 ...
Xav_ing's user avatar
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0 answers
92 views

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 ...
user3409697's user avatar
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0 answers
32 views

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 ...
DSM's user avatar
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1 answer
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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...
franci88's user avatar
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29 views

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.
Rick White's user avatar
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0 answers
55 views

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 ...
user2117779's user avatar
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0 answers
27 views

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: ...
Ali Niaz's user avatar
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0 answers
86 views

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 ...
user7290726's user avatar
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148 views

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 ...
Mike's user avatar
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1 vote
0 answers
89 views

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 ...
stumblebee's user avatar
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137 views

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 ...
Postolar_Bore's user avatar
0 votes
1 answer
40 views

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
mohamad salama's user avatar
0 votes
1 answer
149 views

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/...
Ian M's user avatar
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0 answers
134 views

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 ...
Flamethrower's user avatar
1 vote
0 answers
42 views

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 ...
joker's user avatar
  • 11
0 votes
1 answer
106 views

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) ...
Jyotirmoy Pramanik's user avatar
0 votes
1 answer
84 views

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 ...
PatS's user avatar
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1 vote
0 answers
93 views

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 "...
user3595231's user avatar
1 vote
1 answer
102 views

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 ...
limia12's user avatar
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0 votes
1 answer
62 views

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 ?
fixit7's user avatar
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0 answers
307 views

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 ...
Zero0ne's user avatar
  • 23
1 vote
1 answer
261 views

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 ...
Faris Hasim's user avatar
0 votes
1 answer
98 views

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: ...
Ian M's user avatar
  • 173
0 votes
0 answers
44 views

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-...
user2570135's user avatar
0 votes
1 answer
352 views

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 ...
AeroClassics's user avatar
0 votes
0 answers
103 views

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 ...
IDK_WTD's user avatar
0 votes
0 answers
399 views

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 '/...
heehee100's user avatar
1 vote
2 answers
498 views

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 ...
Ian M's user avatar
  • 173
1 vote
0 answers
53 views

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?
Anonymizer's user avatar
0 votes
0 answers
107 views

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 +-----------------------------------------------------...
user366312's user avatar
0 votes
1 answer
159 views

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 ...
KetZoomer's user avatar
  • 107
0 votes
0 answers
94 views

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: ...
Vikram Jain's user avatar
0 votes
0 answers
25 views

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 ...
lee_in_wv's user avatar
0 votes
1 answer
56 views

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 ...
Pavel Damyanov's user avatar
0 votes
0 answers
201 views

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 ...
Alvaro Dosio's user avatar

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