This was tested with Proton experimental, Proton 8 (all versions since 8.0.3) and Proton 7.0-6.
Steam overlay frame meter reports 1 fps. Mangohud displays frame rate dropping from 120 to 15-25.
Games tested:
The Talos Principle (dx12 with proton)
The Talos Principle 2
No Man's Sky
Starfield
Fallout 4
Myst (2020)
Sable
Stray
Native games like Return to Monkey Island or Firewatch are unaffected.
This was tested with Proton experimental, Proton 8 (all versions since 8.0.3) and Proton 7.0-6.
Steam overlay frame meter reports 1 fps. Mangohud displays frame rate dropping from 120 to 15-25.
Games tested:
The Talos Principle (dx12 with proton)
The Talos Principle 2
No Man's Sky
Starfield
Fallout 4
Myst (2020)
Sable
Stray
Native games like Return to Monkey Island or Firewatch are unaffected.