Stanley Parable (221910)

Compatibility Report

• Name of the game with compatibility issues: Stanley Parable
• Steam AppID of the game: 221910

System Information

• GPU 1: AMD ICELAND (DRM 3.35.0, 5.4.0-65-generic, LLVM 11.0.0)
• GPU 2: Mesa Intel(R) UHD Graphics 620 (KBL GT2)
• Driver version: 3.0 Mesa 20.3.4
• Kernel version: 5.4.0-65-generic
• Link to full system information report as Gist: https://gist.github.com/rybak/6dd42cb97a3e61008d755989198948c7
• Proton version: 4.11-13, 5.13-6 and Experimental

I confirm:

• that I haven't found an existing compatibility report for this game.
• that I have checked whether there are updates for my system available.
• that the PROTON_LOG=1 has been added to the launch options, but only version 4.11-13 has produced a log file: https://gist.github.com/rybak/f05b36914c166c660f15bea1e4688468
• that after adding PROTON_LOG=1, Proton 5.13-6 and Proton Experimental didn't produce a log file.

Notes

• I use DRI_PRIME=1 PROTON_LOG=1 %command% for the custom launch command.

Symptoms

1. With Proton 5.13-6 or Experimental, the game doesn't start at all (i.e. it crashes before I see anything).
2. With Proton 4.11-13, the game launches, but the viewport for the game is broken – only one sixths of the game's output is visible. The following screenshot was made in fullscreen:
   
3. Without Proton, the game launches fine (whole screen is visible), but the game crashes during loading after pressing "Begin the game" (as described in a Steam Community discussion).

Begin by reproducing the three reported cases with Proton 4.11-13, 5.13-6, and Experimental using the documented DRI_PRIME=1 PROTON_LOG=1 %command% launch options. Compare the available Proton log and system information with the startup, viewport, and loading failures described in the report. Done means identifying a reproducible compatibility cause or confirming the relevant behavior has changed.