Big Picture mode crash on dGPU/eGPU since last Steam stable update

[shvetsnikita]

Your system information

• Steam client version (build number or date): 1675222618
• Distribution (e.g. Ubuntu): Ubuntu 22.04.1
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

Big Picture mode crash on dGPU/eGPU, when "Start Steam in Big Picture Mode" is enabled and Steam is started with "DRI_PRIME=1" variable.

Launch via command "DRI_PRIME=1 steam -oldbigpicture" let Steam start on dGPU/eGPU normally, but according to changelog old Big Picture Mode will be eventually removed. Launch via command "steam" let Steam start on iGPU normally, but in this case shades is pro-compiled for wrong GPU, which result in games sub-optimal performance.

HP Dragonfly G2 Linux 6.1.8, Mesa 22.2.5 Radeon Vega 64 attached via HP Thunderbolt Dock G2

Steps for reproducing this issue:

1. Enable "Start Steam in Big Picture Mode" in Interface Settings.
2. Exit Steam.
3. Launch Steam on dGPU/eGPU via "DRI_PRIME=1 steam" command.

In result Steam's integrated CEF will loop crash: steam.log

[shvetsnikita]

Disabling GPU accelerated rendering didn't help.

[thomasfinstad]

If you are still having issues with this, try launching steam with -cef-disable-gpu or -system-composer. Ref: https://github.com/ValveSoftware/steam-for-linux/issues/10543