ValveSoftware / ValveSoftware/SteamOS
PROTON_USE_WINED3D=1 launch option doesn't work in games when in game mode only in desktop mode
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Description
Your system information
- Steam client version: 1785799196
- SteamOS version: 3.8.16
- Opted into Steam client beta?: No
- Opted into SteamOS beta?: No
- Have you checked for updates in Settings > System?: Yes
Please describe your issue in as much detail as possible:
There are some old games, like Fallout 4, where I still need to use the launch option PROTON_USE_WINED3D=1, but this option doesn't run in game mode only in desktop mode.
Steps for reproducing this issue:
- Choose any game, released before 2016 if possible, and try to use PROTON_USE_WINED3D=1 %command% launch option in SteamOS game mode.
- Game won't open.
- Repeat the same in desktop mode, game will open.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the PROTON_USE_WINED3D=1 %command% launch option with an older game in SteamOS game mode, then compare the same launch from desktop mode. Done means the affected game launches successfully with this option in game mode, matching desktop-mode behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- linux
- Domain
- game-dev, operating-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100