Mpv: error while loading shared libraries: libplacebo.so.229

btw package mpv-vapoursynth-git still says this. mpv-full-git also probably needs to be rebuilt.

warning: cannot resolve “libplacebo.so=229-64”, a dependency of “mpv-vapoursynth-git”
:: The following package cannot be upgraded due to unresolvable dependencies:
mpv-vapoursynth-git

Good, one problem solved easy.

Intel OpenCL problem is due to ALHP, somehow. Removing ALHP is one option; but just uninstalling Intel OpenCL support works too.

Audio volume jumping up and down… after the failed attempt of reinstalling pipewire and roll-backing the system, the issue vanished

Just remains the display issue, xrandr going bunkers with my internal display, with all kind of side-effects. Hopefully that last issue can be figured out soon.