Drastic drop of performance in 2D games, 3D games refuse to run
Pop_OS 19.10, Kernel 5.5.2, Navi 10 (rev c1) RX 5700 XT, LLVM 9.0.1, Mesa 20.1.0-devel (git-27996762 2020-02-05 eoan-oibaf-ppa).
Something went horribly wrong with few recent Mesa updates available at Oibaf PPA. Xorg updates were bundled and I know of someone that has basically the same setup but uses wayland and doesn't have my problems. SMPlayer cannot go into fullscreen and outputs video into separate window so it's not only games. Entire desktop environment works slower. Nier Automata gave a prompt that it didn't detect video memory.
I tried Padoka PPA (8 days old mesa) and didn't have those problems so I think it's not an issue of Kernel. Problem started after yesterday's update and persisted through all the updates so far.
Edited by Desmana Moschata