This may not be a Linux specific problem as I had the exact same issue earlier with Windows 7 and it's one of the reasons I installed Linux in the first place.
The specific game I'm trying to play is DayZ but it may not be issue specific to this game. It worked flawlessly untill this point. I had made no changes to anything. Basically when I try to launch the game it starts loading up normally and then just apparently quits and the "Play" button goes back green. No error, no black screen, no freezing or anything. It just stops launching the game.
I've tried checking the integrity of files, deleting downloads catche, disabling steam cloud, removing launch options.. nothing. Almost like it gets blocked by firewall or something. However I feel like it may be an issue with steam itself or then it's a hardware issue (I've got really old PC)
Few things I've noticed that may or may not be related:
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When opening up steam it almost always used to download some updates first and check the integrity of them or something. Now it doesn't. It just opens up Steam. When I click "check for updates" it says everything is up to date.
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The firmware updater shows available updates for my SSD and HDD but no option to update. I also tried with
sudo fwupdmgr get-devicesbut it says "UEFI firmware can not be updated in legacy BIOS mode See https://github.com/fwupd/fwupd/wiki/PluginFlag:legacy-bios for more information."
- In the privacy settings it says "checks failed" and gives me this message:
- I've tried reinstalling Proton BattlEye Runtime but it wont let me uninstall it and says "missing shared content"
You press play and it goes off after a while, you have problems with vulkan, you have an old PC.
I had this exact issue before, try tuning an older version of proton, as newer versions require more recent vulkan versions, which your PC most likely doesn't support.
steam auto updates to the latest proton version usually, that's probably why.
I did get the "Processing vulcan shaders" pop-up sometimes when I opened the game (back when it was still working) So I should not be using the Proton experimental? It worked just fine untill now. That's what's so strange about it. I do have an old PC but my GPU is brand new though.
I'm trying to re-install steam right now but it's been uninstalling it for about an hour and doesn't seem to be progressing anywhere..
1 - Proton experimental is a moving target and is rapidly evolving.
2 - What exactly is your GPU, and maybe tell us your pc specs (even if it's just through the info tab in the settings menu) (also put it in your post for others)
3 - that sometimes happens to me when using gnome-software (which Ubuntu uses? or something really similar?), I usually just surrender and use the terminal, not like I install more than 1 thing in a normal month anyway.
4 - if the issue is with proton, then other games wouldn't work. (try running a very light, single player game to test proton, many F2P games under 20 mbs exist on Steam)