Details
-
Bug
-
Resolution: Unresolved
-
P3: Somewhat important
-
None
-
6.8.2, 6.9.0 Beta2
-
None
-
Vulkan, AMD Radeon 780M (radeonsi, gfx1103_r1, LLVM 19.1.6, DRM 3.54, 6.6.30-rt30), Mesa 24.3.4
Wayland
Happens on mutter 47.4 and weston 14.0.1.
Tested on Qt 6.8.x and 6.9 (beta 2)
-
Linux/Wayland
Description
When using native window rendering within Qt (which is necessary if we want to paint in the widget manually, say, for vulkan surfaces) various refreshing artifacts appear on Wayland and the native Qt UI elements become garbled.
This happens on wayland compositors that do not implement SSD, specifically mutter (GNOME) and weston. The UI works fine on KDE.
You can find a small repro program here: https://projects.govanify.com/govanify/qt-native-wayland-borked
Here's an example of the issue:
Additionally, I'm getting this in the logs when hiding and showing back ui elements in this state:
The cached device pixel ratio value was stale on window expose. Please file a QTBUG which explains how to reproduce.
I've included various recordings showing the bug in action.
Several Qt apps I've tried are affected by this issue if you start them with the environment variable QT_USE_NATIVE_WINDOWS=1 , for example wireshark.
