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Questions tagged [20.10]

Questions about 20.10 are off-topic on Ask Ubuntu. Ubuntu 20.10 (Groovy Gorilla) was a non-LTS version released on October 22, 2020. It became End Of Life (EOL) on July 22, 2021.

Ubuntu 20.10 (Groovy Gorilla) was released on October 22, 2020 and became EOL (End Of Life) on July 22, 2021. Questions about 20.10 are off-topic on Ask Ubuntu.

Notable features include:

  • Linux kernel 5.8
  • Gnome 3.38, including:
    • BlueZ 5.55
    • NetworkManager 1.26.2
  • nftables is now the default backend for the firewall.
  • Ubuntu 20.10 is the first Ubuntu release to feature desktop images for the Raspberry Pi 4

Release notes

691 questions
49
votes
3 answers

Screen share shows a black screen after upgrade from Ubuntu 20.10 to 21.04

Screen share shows just a black screen after the upgrade from Ubuntu 20.10 to 21.04. It was working fine until 20.10. Tried in Google Chrome, Firefox, etc. all of them shows just the black screen. It is not related to the browser. Any idea how to…
yottabrain
  • 973
33
votes
6 answers

VLC crashes on startup: Qt: Session management error: Could not open network socket

I using Ubuntu 20.10. All of a sudden, VLC cannot be started. When trying to run it through the command line, I get: $ vlc VLC media player 3.0.12.1 Vetinari (revision 3.0.12.1-0-g170157402b) [00005573fa81cb40] main libvlc: Running vlc with the…
Uri
  • 883
24
votes
2 answers

How do you install CUDA 11 on Ubuntu 20.10 and verify the installation

There seem be be several options to install CUDA on Ubuntu 20.10: It is pre-bundled with 20.10, there are various installers at the official NVIDIA page, etc. Question: What is a recommended way to install CUDA 11.X on Ubuntu 20.10, and how do I…
B0rk4
  • 1,673
20
votes
6 answers

How to uninstall dotnet from Ubuntu 20.10 completely?

I have installed dotnet on my Ubuntu 20.10 but for some reason I want to remove it but I don't know how to do it please help.
Gaurav
  • 301
19
votes
1 answer

Ubuntu 20.10 sssd (System Security Services Daemon) failure

Don't know why, but they decided to add sssd (System Security Services Daemon) to the standard Ubuntu 20.10 upgrade and fresh install. It fails to start, and generates lots of error messages. It's not configured at install time, as it's missing the…
heynnema
  • 73,649
17
votes
1 answer

How to solve apt-key deprecated?

I'm using Ubuntu 20.10 and I'm trying to get the latest signature-key and when I do that I get these lines: root@kubernetes-worker:/home/jonteyh# curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add - % Total % Received %…
Jonte YH
  • 2,113
17
votes
4 answers

Kolourpaint missing all icons on Ubuntu 20.10

Kolourpaint is missing icons in the tools pane on Ubuntu 20.10 when installed using sudo apt install kolourpaint. Is there a solution that does not require using the snap version or changing the system icon theme?
Enterprise
  • 12,792
16
votes
5 answers

Viber executable crashes on Ubuntu 20.10 / 21.04

I have been using Viber for Desktop (the official .deb package downloaded from https://download.cdn.viber.com/cdn/desktop/Linux/viber.deb ) for at least 4 normal Ubuntu versions (18.10 through 20.04) with no problem. A few days ago I upgraded from…
FedKad
  • 13,420
14
votes
2 answers

Missing AACS configuration file" error when playing blueray movies

I'm on ubuntu 20.10, and I keep getting this error code whenever I try to play a bluray movie in VLC media player Missing AACS configuration file I don't know what to do, and I was wondering if anyone has encountered this problem and how to fix it,…
how to ubuntu
  • 309
13
votes
3 answers

Transaction for graphical.target/start is destructive

After I forcefully turned System off, and then Turned on tomorrow morning, I got :- Failed to start default target: Transaction for graphical.target/start is destructive (emergency.target has 'start' job queued, but 'stop' is included in the…
Hacke
  • 428
  • 1
  • 4
  • 13
13
votes
5 answers

libffi.so.7: cannot open shared object file: No such file or directory

I just upgraded to ubuntu 20.10 and when I tried to work with rails app that was working perfectly fine earlier started to show this error. LoadError: libffi.so.7: cannot open shared object file: No such file or directory -…
MH Sagar
  • 417
12
votes
4 answers

How to test the microphone on a laptop?

Everything here works so far -- in that, crucially, the sound plays back. How is the microphone itself tested? nicholas@gondor:~$ nicholas@gondor:~$ sudo aplay -l **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0:…
Nicholas Saunders
  • 1,484
12
votes
4 answers

LUKS Disk Encryption on Raspberry Pi 4 and Ubuntu Desktop 20.10

Using the pre-installed Ubuntu Desktop 20.10 disk image for the Raspberry Pi 4 (64-bit ARM), you do not get an option to encrypt the disk using LUKS when you install the system, as you do with the x86 USB-based installers. For reference, I followed…
davetronics
  • 121
11
votes
1 answer

Can't find Alt-F5 in Settings/Keyboard Shortcuts

Eclipse uses Alt+F5 to Update Maven Project. It's worked on earlier versions of Ubuntu, but on 20.10 that key combination is mapped to Un-maximize window, which is also what Super+↓ does. I cannot find Alt+F5 under Settings → Keyboard Shortcuts, and…
GrampaJohn
  • 211
11
votes
1 answer

Weird error when trying to install packages with apt

I am trying to install for example mosquitto package with apt then I do sudo apt-get install mosquitto and I get an error dpkg: error: fgets gave an empty string from '/var/lib/dpkg/triggers/Unincorp' E: Sub-process /usr/bin/dpkg returned an…
dahan raz
  • 381
1
2 3
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