Tried downgrading all the mesa packages to the ones in stable (as of now that is mesa 20.3.5-1), with which kwin (from stable, version 5.20.5) was previously working correctly in this same setup, but the problem persists.
The GPU still works as expected with a live CD image of some other distro such as opensuse. On Fri, 2021-09-03 at 09:03 +0900, Norbert Preining wrote: > On Thu, 02 Sep 2021, David Cortes wrote: > > Every time I start a new plasma session and kwin launches, it will > > have > > a series of graphical glitches which make the session unusable, > > Sounds like a broken mesa stack or broken GPU. Reading the upstream > bug > also makes me wonder. I myself am running on amdgpu without any > hitches. > > Best > > Norbert > > -- > PREINING Norbert > https://www.preining.info > Fujitsu Research + IFMGA Guide + TU Wien + TeX Live + Debian > Dev > GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C > DC13