I just installed Ubuntu 20.04.2 LTS recently (I'm a first time user) and I am experiencing a weird graphical glitch. The row of pixels at the top of my main monitor displays randomly flickering colours. For illustration purposes here is a short video:
I have 4 displays. 2 monitors hooked up to my CPU's graphics, as well as a TV and a main monitor hooked up to my GPU. The glitches only occur on the TV and main monitor, and only when the TV is turned on. alt + f2 and then typing "r" fixes the glitches, but only when the TV has been turned off.
So far I have tried installing new AMD drivers, but that didn't seem to fix the issue and installing them also failed (I think). I even updated to a completely new kernel, and tried using LightDM instead of GDM but that also didn't fix it.
I am a Linux noob and I'm out of ideas, how can I fix this? It's very annoying :(
- Graphics card is AMD Radeon R9 280.
- Gnome version 3.36.8
- Windowing System X11
- Kernel 5.10.17-051017-generic