I just upgraded from Fedora 33 to Fedora 34 and experienced serious issues making my computer usable. There is a rendering issue making the screen flicker/strange pixels patterns appearing for almost every app (including gnome terminal). Interestingly, the only app that seems unaffected is firefox. The only non-standard thing about my setup is that I have a 1400p 144hz display. My graphics card is Amd 5600xt so I do…
I have the exact same issue, still on 33. Running Ryzen 3600X and RX 480. I think it could be a kernel update, got bumped to 5.11.16 last night, don't recall any Mesa updates in the list (using update-testing repos).
I'd highly recommend waiting to upgrade