protonscr

VRChat

appid 438100 3 threads, 1 open 1,199 comments last activity 2026-10-22
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Latest maintainer comment · kisak-valve · 2026-10-02 · #1199
Hello @ParsleyNeos, please add [`PROTON_LOG=1 %command%`](https://github.com/ValveSoftware/Proton#runtime-config-options) to the game's launch options and attach the generated $HOME/steam-$APPID.log to this issue report as a file. (Proton logs compress well if needed.)
Threads

VRChat proton open

#1199 · 1,197 comments · opened 2018-09-03 · last comment 2026-10-22 by All-The-Foxes

VRChat proton closed

#6687 · 1 comments · opened 2023-04-15 · last comment 2023-04-15 by kisak-valve

VRChat post udon update proton closed

#3934 · 1 comments · opened 2020-06-04 · last comment 2020-06-04 by kisak-valve
Recent activity
  • All-The-Foxes · 2026-10-22 · VRChat
    I've encountered an issue where sometimes joining a world will cause VRChat to hang on 'joining' followed by Steam itself crashing and restarting (I think, since all the Steam related buttons and stuff disappears off of ...
  • peq42 · 2026-10-14 · VRChat
    I forgot to report last I posted here: Downgrading/switching to custom versions of proton seems to cause VRChat to crash **VERY** often. Recently, when the game got upgraded to Unity 6, that same issue also started happe...
  • Enverex · 2026-10-03 · VRChat
    I'm not running Linux on my VRC playing machines, but I have a user complaining about AV1 A/V being out of sync when using AVPro. Can anyone else confirm this behaviour?
  • ParsleyNeos · 2026-10-03 · VRChat
    Requested log attached. [steam-438100.log.gz](https://github.com/user-attachments/files/33007230/steam-438100.log.gz) Extra notes: 1. This problem started whilst playing VRChat for ~1 hour, not at a startup, so unlikely ...
  • kisak-valvemaintainer · 2026-10-02 · VRChat
    Hello @ParsleyNeos, please add [`PROTON_LOG=1 %command%`](https://github.com/ValveSoftware/Proton#runtime-config-options) to the game's launch options and attach the generated $HOME/steam-$APPID.log to this issue report ...
  • kisak-valvemaintainer · 2026-10-02 · VRChat
    [BUG] VRChat Lockup at start. Issue transferred from https://github.com/ValveSoftware/SteamVR-for-Linux/issues/982. @ParsleyNeos posted on 2026-10-02T23:13:59: **Describe the bug** Start VRChat in VR mode. 5 seconds afte...
  • Kyder · 2026-09-16 · VRChat
    >Dec 28, 2025 https://github.com/ValveSoftware/Proton/issues/1199#issuecomment-3694325083 Soo this world got even more broken on Proton experimental, now this world [Pocket Storm by Silyataru ](https://vrchat.com/home/wo...
  • DASPRiD · 2026-09-03 · VRChat
    > **EDIT**: An example of shader that almost always does that is "**Warren's Fast Fur Shader**"(it's free, so probably the best for testing the problem). While it does have minimal impact in performance for everyone, lik...

Proton versions over time

Launch lines, newest first

PROTON_LOG=0 AMD_VULKAN_ICD=RADV mangohud %command% --enable-hw-video-decoding --affinity=FFFF --process-priority=2 --main-thread-priority=2 -screen-width
unset=SDL_VIDEODRIVER DXVK_ASYNC=1 %command% --disable-hw-video-decoding --enable-avpro-in-proton
gamemoderun %command% --enable-avpro-in-proton
WINE_CPU_TOPOLOGY="40:0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39" %command%
PROTON_USE_WINED3D=1 PROTON_USE_D12VK=1 gamemoderun %command%
PROTON_USE_WINED3D=1 %command% --enable-avpro-in-proton

Launch options

Upstream links

DLLs

Error codes