Your system information

• Steam client version (build number or date): 1608607519
• Distribution (e.g. Ubuntu): Fedora Workstation 33
• Opted into Steam client beta?: [Yes/No] No
• Have you checked for system updates?: [Yes/No] Yes

Please describe your issue in as much detail as possible:

Together with this problem, games are(were) taking much longer (more than 5 minutes) to open or show an error after some of the recent Steam client updates, some would show as running but would never open any window, but the executable would be show by ps or htop. I reinstalled some games to test, used the Verify integrity of game files, but no success.

The only time when a game would open was with, if it was compatible, Proton-5.9-GE-7-ST. Tried other version including Proton-6.0-GE-1 and Proton-6.1-GE-1. Multiple SteamLinuxRuntime_soldier are kept open after closing Steam.

Also most of the time with the new Steam interface, when I changed or disabled a version in Properties -> Compatiblity tab, I had to close and reopen Steam.

I uninstalled Steam and completely removed all folders, rename my library folder. Reinstalled it; reenabled the SteamPlay; created an empty folder for my games library; installed a game (Desert of the Dead very small one, did not work); copied all games back. The problems persist. Tested also with setenforce 0 and previous kernels, even before 5.10.

Steps for reproducing this issue:

1. Open Steam;
2. Try to open a game with any proton version, including Proton-GE;
3. wait, wait, wait until the error or no window;