https://bugs.kde.org/show_bug.cgi?id=519830
Bug ID: 519830
Summary: [Wayland/Sway] Touch gestures on canvas hang after
pointer interaction until complex UI widget is
focused.
Classification: Applications
Product: krita
Version First 6.0.1
Reported In:
Platform: CachyOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: General
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
Pointer presence on the Canvas Subsurface prevents gesture initiation.
STEPS TO REPRODUCE
1. Open Krita 6.0.1 on Sway (xwayland disabled or QT_QPA_PLATFORM=wayland is
set).
2. Move the mouse/touchpad pointer over the drawing canvas.
3. Attempt a touchscreen gesture, like drawing with your finger or pinch zoom
(It will likely fail).
4. Click a "simple" action button like Redo or Undo (Gestures still fail).
5. Click or interact with a "complex" widget (e.g., Opacity Slider, Layer
Docker, or Palette color history).
6. Attempt the gesture on the canvas again (It now works).
SOFTWARE/OS VERSIONS
Latest CachyOS:
❯ uname -r
7.0.3-1-cachyos
❯ sway -v
sway version 1.11
❯ pacman -Q wlroots0.19
wlroots0.19 0.19.3-1.1
❯ pacman -Q qt6-base
qt6-base 6.11.0-3.1
❯ pacman -Q krita
krita 6.0.1-5.1
ADDITIONAL INFORMATION
WAYLAND_DEBUG confirms wl_pointer.leave is sent by Sway, but Krita/Qt6's
gesture state machine remains locked.
I tested, issue is not present in Plasma (KWin) - perhaps KWin is more
mature in terms of hiding pointer input focus when a touchscreen gesture is
detected compared to wlroots?
Launching krita with "QT_QPA_PLATFORM=wayland-egl krita" does not help.
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