System spec - Ryzen 3700X CPU - AMD RX 7900 XT GPU
I got an AMD GPU specifically because I wanted to switch to Linux. I’ve done a bunch of testing over the last year while I still had an nVidia card. Now I’ve got an AMD GPU I feel ready but it has not gone well.
When I use multiple monitors I get a range of odd behaviours, including a white screen, lock ups, failure to display anything on second screen. I’ve unplugged the second screen for now and all is OK except that adaptive sync does not work properly.
When I set adaptive sync to “Always” in the settings the screen sort of flickers when I move the mouse. To be more precise the screen gets a bit brighter when the mouse is moved, then returns to previous slightly dimmer brightness when the mouse is stopped. There are no errors that I’ve found.
Both of those issues happen in fresh Fedora 38 and Arch Linux installs. I’m running KDE-plasma (using Wayland not X) so it seems like a KDE issue. Though I’m about to test it with a Fedora and gnome install next, though I doubt it will be any different.
You have a fairly recent piece of graphics hardware. It’s not too surprising that it doesn’t work super smoothly. This is often the case. Even with Intel who’ve had a long open source driver tradition, a new integrated GPU often has driver bugs. I know I had to turn off a few things on my 11th gen Intel GPU for a year and a bit until the bugs got squashed. To avoid any of this, I rarely buy bleeding edge hardware.