Hi,
I recently upgraded my Debian from buster to bullseye, so I'm currently running Plasma 5.20.5. Everything always worked pretty good so far, but since the upgrade, I'm getting this annoying "flickering" in some Plasma elements (primarily in the bottom bar, and in the log back screen). Here are two videos ilustrating this:

https://www.youtube.com/watch?v=S_G5CGAv0Eg
https://www.youtube.com/watch?v=PFGtfxi11to

I've tried reinstalling the plasma-desktop package and deleting the main config file, but with no success.

This is the info of my system:

Integrated Intel UHD Graphics 630 and nVidia RTX2060, although I'm using Plasma with Intel Graphics

X11

One screen on external HDMI monitor connected to a dongle via mini displayport (it also happens on the laptop's screen

Standard 1080 screen resolution

Using i3 as window manager, but the problem still happens when using the KDE native WM

Any hint here?

Thank you very much!

You need to be a tad more detailed on your graphic system (graphic card, driver used, X11 or Wayland, Monitor resolution, etc.) when asking questions about graphical problems

Mamarok wrote:You need to be a tad more detailed on your graphic system (graphic card, driver used, X11 or Wayland, Monitor resolution, etc.) when asking questions about graphical problems

Sure, thank you. I updated the OP.

Hi,

Just want to mention I have the exact same problem after upgrading to bullseye,. It's extremly anoying.

I've tried countless things found on the internet, none of them solved the problem.

Code: Select all

00:02.0 VGA compatible controller: Intel Corporation CometLake-U GT2 [UHD Graphics] (rev 02)

I've reported the bug on debian here:

https://bugs.debian.org/cgi-bin/bugrepo ... bug=996676

I wonder wether the problem happens only when upgrading, or even when reinstalling debian 11 or using a live cd.

That really is a shame that no solution is being found for this problem. It is very probematic.

Ok so I tested with a live cd, and it does not flicker. Then it's really the upgrade that broke something.

I would like to have the possibility to avoid reinstalling everything but sounds complicated.

I don't understand at all what config file may be the cause of the problem. At least I'm sure it's not user-side config file, cos creating a new user does not solve the problem. It's system side problem. Changing the display manager to lightdm does not help either.

Well I guess if i don't find I will reinstall the system.

I eventually reinstalled debian, and everything is fine now.

Thank you for your trials and outcomes. It seems that reinstall will be the only solution for me too.