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I'm on Ubuntu 20.04 and after an upgrade, my resolution was reset on reboot. I went from a 1920x1080 resolution to a 800x600.

I normally use arandr to adjust my resolution, but now I only have the 800x600 option. My output was named VGA or something similar. Now it's called default.

When I enter the command xrandr -q, I got this:

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 800 x 600, current 800 x 600, maximum 800 x 600
default connected 800x600+0+0 0mm x 0mm
   800x600       75.00*

Can someone help me to fix this urgently, please ? This is almost impossible to work like this.

By the way, I already tried these: Failed to get size of gamma for output default when trying to add new screen resolution and https://stackoverflow.com/questions/47391669/xrandr-displaying-failed-to-get-size-of-gamma-for-output-default without any success.

When I enter this lspci | grep VGA, I got this output:

01:00.0 VGA compatible controller: NVIDIA Corporation GK208B [GeForce GT 730] (rev a1)

I don't really know if this is important, but I saw people giving their GPU specs on several posts.

Bravo2bad
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2 Answers2

9

Nevermind, I have found the solution here: https://www.fosslinux.com/41008/install-nvidia-driver-on-ubuntu-command-line-and-gui-ways.htm

Basically, the upgrade somehow uninstalled my Nvidia drivers.

I just reinstall them with sudo ubuntu-drivers autoinstall before rebooting.

Bravo2bad
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For ubuntu 22.04 - I tried sudo apt update && sudo apt upgrade which basically installed nvidia drivers only and it worked. Just go to additional drivers > you can find nvidia corporation > continue using a manually installed driver(in the bulleted list below it).

Mukul Anand
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