https://bugs.kde.org/show_bug.cgi?id=522374
Bug ID: 522374
Summary: Direct Scanout fails to active for native SDL game
(dota 2), when tearing enabled (wayland and xwayland)
Classification: Plasma
Product: kwin
Version First 6.7.1
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
I tested Dota 2 (Wayland and Xwayland) and CS2
Am on nvidia, so for xwayland I have to set the Allow Tearing Rule to On, I can
see
```
Changed presentation mode to KWin::PresentationMode::AdaptiveAsync
```
But game is not direct compositing anymore (check using show compositor in kde6
debug), but when I force Allow Tearing to no, it works and presentation mode is
```
Changed presentation mode to KWin::PresentationMode::AdaptiveSync
```
I tested wine-wayland and xwayland, forcing tearing on, on wine games work
fine, direct scanout always work, but only native game using sdl3, it's not
working. Enabling Tearing disables direct scanout.
In case of cs2 (wayland), Direct Scanout Works only if i am using same
resolution as the monitor, it doesn't work if i use smaller resolution.
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