protonscr

Pragmata: Assertion failed in winevulkan/loader_thunks.c (vkGetPastPresentationTimingEXT)

protonclosed appid 3357650
ValveSoftware/Proton#9760 · opened 2026-05-08 by radioactivemd · updated 2026-05-08 · 2 comments · github · game page · search this game
Rradioactivemd 2026-05-08 github

Compatibility Report

  • Pragmata
  • Steam AppID of the game: 3357650

System Information

  • GPU: 9070 XT
  • OS : CachyOS
  • Video driver version: Mesa 26.1.0
  • Kernel version: 7.0.5-1-cachyos
  • Link to full system information report as Gist:
  • Proton version: proton-cachyos-11.0-20260429 (steam linux runtime)

I confirm:

  • [ X] that I haven't found an existing compatibility report for this game.
  • [X ] that I have checked whether there are updates for my system available.

Log:

steam-3357650.log

Symptoms

After a recent system update on CachyOS, Pragmata (AppID: 3357650) fails to launch with a Wine assertion error. This was working correctly prior to the update.

A Windows-style "Assertion failed!" popup appears immediately upon launch:File: ./dlls/winevulkan/loader_thunks.cLine: 5414Expression: "!status && "vkGetPastPresentationTimingEXT""

Reproduction

Launch Pragmata from Steam on a current CachyOS installation.The game process starts but immediately displays the assertion error popup before any video output.

Kkisak-valve maintainer 2026-05-08 github

Hello @radioactivemd, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/9677#issuecomment-4408133195.

Rradioactivemd 2026-05-08 github

Sorry, I was unaware. Thank you!

Upstream links