[TF2] Alt tabbing on linux causes severe graphical issues

[Hedwig7s]

EDIT: It seems to happen whenever rendering refreshes, like when taking a screenshot (F5) for the first time after loading the game

In case it's relevant I am using Linux Mint 21.3 Cinnamon on X11

When alt-tabbing in the middle of a game, several graphical issues can occur including:

• Player models disappearing
• Player models being the wrong team color
• Player models being the wrong class
• Players turning into floating weapons
• Taunt sounds and custom models (such as the bumper cart in the Victory Lap) disappearing (alongside the deploy animation replaying)

Now I know source games don't particularly like being alt-tabbed, but this feels more extreme than before Also the symptoms of this issue have been known for a while and can be temporarily fixed by starting and stopping a demo, but the issues I am experiencing right now feel more extreme than usual, likely due to being directly caused by alt tabbing now

Please look into this

[Hedwig7s]

I do want to note that it is not consistent (although if it does happen I usually see weirdness like taunts resetting after tabbing back) sometimes everything works fine other times it gets real funky

[TheBoctor]

What you described sounds identical to packet/netprop loss. Almost like the whole client is getting suspended when backgrounded. If you disable (0) the snd_mute_losefocus convar, can you still hear the game's sounds playing while it's inactive? If you launch TF2 with the old OpenGL (ToGL) renderer, does the issue still happen?

[Hedwig7s]

For the first question, yes For the second, I'm gonna need to do more testing

[Hedwig7s]

I have not been able to replicate this consistantly, although I definitely notice that visual bugs start to happen when taking a screenshot for the first time or when alt tabbing for a bit Easiest way to tell is to do a looping taunt and when the bug happens the taunt's models disappear, the sound breaks and the animation restarts

[Tiagoquix]

This may be due to the way your graphics vendor implements Vulkan rendering.

[dandongus]

Please check whether this issue still occurs when engine_no_focus_sleep is set to 0.

[Hedwig7s]

After further inspection it seems this happens mostly on skial. May be related to the sv_pure?