Beat Saber stutters

[frostwork]

recently Beat Saber started to stutter on my system.
running arch linux with 5.0.13-arch1-1-ARCH, nvidia-418.74-1, RTX 2080
other VR games work just fine and I also re-installed Beat Saber and tried with Proton 3.7-8 and with 4.2.3. both steam and steam vr are beta.
not urgent, but would be nice to know if there are others with the same problem? maybe with the same distro and/or nvidia drivers? :)

[frostwork]

in case someone else is searching.
probably related: https://devtalk.nvidia.com/default/topic/1051300/linux/inconsistent-but-frequent-freeze-caused-by-steamvr/

[Not Root]

Just stutters? Not an outright freeze that renders the whole system unusable unless you can shell in?

I wonder if the freeze may be specific to Pascal GPUs then.

[frostwork]

it froze several times on exit, but not in-game. and even then it was enough to switch tty back and forth (in fact it probably just exited in between)

[frostwork]

not sure what finally fixed it, but it must have been one of the following:
- renamed the ~/.steam/steam/config/SteamVR and let it recreate it self
- removed everything in ~/.nv/GLCache
- sudo setcap cap_sys_nice+eip on /path/to/steamapps/common/SteamVR/bin/linux64/vrcompositor-launcher (afaik this is not even required on nvidia - in any case getcap was empty)
- recovered an old backup of ~/.steam/steam/config/steamvr.vrsettings

haven't looked in detail what might have been the issue, but BeatSaber is buttersmooth again.
I can exclude both nvidia-430.14-3 and BeatSaber 1.0 version, because it still stuttered before above changes. good luck