ValveSoftware / ValveSoftware/Proton

Proton fails to launch if i have changed my monitor resolution to non native in nvidia x settings

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Dominant language
C++
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Forks
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Description

all current proton versions including custom ones are effected

Replication

  • have 2 monitors connected by display port on an NVIDIA GPU one 1440p native the other 1080p native
  • open NVIDIA x server settings using sudo
  • under X server display configuration click advanced
  • click the 1080p native monitor
  • set vewportin to 2560x1440
  • close NVIDIA settings
  • open steam and try to start any game
  • it will fail to open after trying to sync to steam cloud

System Software

Distro:

  • Arch Linux

Kernel:

  • Linux 5.15.30-1-lts x86_64

Desktop Environment:

  • KDE Plasma with kwin as window manager

Steam Version:

  • 1647446817

Steam System Information

steam system info.zip

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the failure with the two-monitor NVIDIA setup, KDE Plasma, KWin, and the 2560x1440 viewport setting described in the issue. Review the attached Steam system information ZIP and compare launching games across Proton versions. Done means Proton games launch successfully after the non-native viewport is configured.

Written by the indexing model from the issue text.

Assessment

Tech stack
linux
Domain
desktop, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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