I have the same launcher error when using the windows build of CSGO. Still don't have access to cs2 so I can't comment on that. Have you tried disabling proton for CSGO so that steam uses the linux build instead?
CS:GO has native linux supports, why yo should be trying proton?
Hello @Cytomax55, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/2704#issuecomment-1733618250.
9-26-23 EDIT: I AM NOW USING CSGO NATIVE WITH -VULKAN AND CSGO SEEMS TO BE WORKING AGAIN PERFECTLY
ITS NOT ASKING ME IF I WANT TO LAUNCH CS2 OR CSGO ANYMORE BUT ILL TAKE IT.. I CONSIDER THIS FIXED
Compatibility Report
System Information
I confirm:
Symptoms
Counter Strike Global Offensive was working perfectly > I finished a match and while in the main menu of CSGO i was offered a slot to try out CS2 so i clicked enroll and restarted steam and it started downloading CS2 > after it installed i restarted my computer and i wasnt able to play CS2 > i found out it doesnt work with Linux so no problem > i then try to play CS GO and it gives me the error i took a screen shot of
Steam FATAL ERROR: Failed to connect with local Steam Client process!
I have been unable to play CSGO since
Reproduction
try to play CS GO, doesnt matter if i try different protons, opengl, vulkan, nothing works
steam-730.log