protonscr

XeLL doesnt work on some UE5 Games via Optiscaler, and VKD3D_CONFIG=no_staggered_submit fixes the issue

vkd3dopen
HansKristian-Work/vkd3d-proton#3175 · opened 2026-07-27 by Valarck82 · updated 2026-07-29 · 2 comments · github
VValarck82 2026-07-27 github

Please describe your issue as accurately as possible without being overly verbose (no wall of AI/LLM output). Include screenshots or videos if relevant

Basically, this command helps with a performance boost, and also makes work XeLL with Optiscaler: VKD3D_CONFIG=no_staggered_submit.

I have not found any other game where this command helps, but i will continue investigating.
According to some Optiscaler Devs this is due to the way the .exe of the games were packged, and quoute; "configs will only make a diff on unreal games that arent using win64-shipping format, win64-shipping named exes already have the configs apploed" which myselft confirmed that's the case for those games.

Software information

Neverness to Everness and Mafia:The Old Country

System information

  • GPU: Rx6700M
  • Driver: Mesa - git (Radv) 26-2
  • Wine version: 11
  • VKD3D-Proton version: 3.1

Log files

Please attach Proton or Wine logs as a text file:

Log whitout the command

steam-4508340.zip

Image

Log with the command

Image

steam-4508340.zip

  • When using Proton, set the Steam launch options for your game to PROTON_LOG=1 %command% and attach the corresponding steam-xxxxx.log file in your home directory.
  • When using regular Wine, use wine game.exe > game.log 2>&1 and attach the resulting game.log file.
Ddoitsujin maintainer 2026-07-29 github

Do you have framegen enabled or something?

Not sure how XeLL works exactly, but I don't think it's unexpected that there are issues. We really need proper driver support for multiple graphics queues.

VValarck82 2026-07-29 github

Do you have framegen enabled or something?

Not sure how XeLL works exactly, but I don't think it's unexpected that there are issues. We really need proper driver support for multiple graphics queues.

I have XeFG enabled, since XeLL only can works with XeFG enabled on other hardware vendors rather than intel

Launch options