https://bugs.kde.org/show_bug.cgi?id=499103
Bug ID: 499103
Summary: Some HDR scRGB games are broken in fullscreen
Classification: Plasma
Product: kwin
Version: 6.2.91
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: bugs.kde....@mail.sporif.com
Target Milestone: ---
SUMMARY
Some games that use scRGB (VK_COLOR_SPACE_EXTENDED_SRGB_LINEAR_EXT) in HDR are
limited to SDR luminance levels when fullscreen, causing a blown out image.
However, when the game is not fullscreen (using the Meta+F shortcut) HDR works
normally. It also works if the game fully covers the screen (auto hide panel,
no borders) but is not fullscreen.
STEPS TO REPRODUCE
1. Play a game that uses scRGB in HDR (e.g. Assassin's Creed Odyssey, Cyberpunk
with the HDR Mode set to scRGB, Star Wars Jedi: Fallen Order).
2. Ensure the game is fullscreen.
3. Enable HDR in the game's settings.
OBSERVED RESULT
Highlights are clipped as if limited to SDR levels.
EXPECTED RESULT
HDR works normally.
SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.2.91
KDE Frameworks Version: 6.10
Qt Version: 6.9.0beta2
ADDITIONAL INFORMATION
- The issue also occurs with KWin 6.2.5.
- The issue occurs with both gamescope and native wayland.
- Hot Wheels Unleashed is an HDR scRGB game but does not exhibit this issue.
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