Q:

Why the screen turns black?

I'm using a Vega8/RX/RG laptop. When I try to change the screen resolution it only shows a black screen, then returns to the previous resolution.
The driver is amdgpu, the distro is openSUSE Tumbleweed.
I have been trying to change to 1440x900 using xrandr and arandr.
Is there any way to make it use the custom resolution?

A:

Either you're hitting a driver error in which case you might try installing the freshest available stable kernel which is 5.8.3 at the moment or your monitor doesn't actually support the desired resolution.
Also make sure you've checked /var/log/Xorg.0.log and dmesg for errors. I suspect you'll find your answer there.

