https://bugs.kde.org/show_bug.cgi?id=495325
Bug ID: 495325
Summary: Blender intermittently stops receiving mouse/keyboard
input on focus once keyboard shortcut for
Lockscreen/Sleep is used.
Classification: Plasma
Product: kwin
Version: 6.2.2
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: sauce...@protonmail.com
Target Milestone: ---
Created attachment 175206
--> https://bugs.kde.org/attachment.cgi?id=175206&action=edit
Video of Blender not focusing
SUMMARY
In KDE Wayland post Plasma 6.2.0, if I use the Lockscreen or Sleep keyboard
shortcuts to lock the screen, Blender will more often than not stop responding
to keyboard or mouse inputs if it loses and regains focus, see video attached.
The window still gains focus, but Blender itself doesn't register the keys.
When this happens, this is repeatedly printed in the journal
> blender[41890]: WARN (ghost.wl.keyboard.depressed):
> intern/ghost/intern/GHOST_SystemWayland.cc:7501 getModifierKeys: modifier
> (OS) state is inconsistent (GHOST released keys do not match XKB)
It only happens if I use the keyboard shortcuts. If I manually go to the
application launcher and sleep/lockscreen, it doesn't happen. Other keyboard
shortcuts, like ALT+TAB also don't cause any issues.
To fix it, i have to log out and log in, or do a kwin_wayland --replace.
Restarting Blender doesn't fix it. Relocking the screen again reintroduces the
issue.
This bug started happening in Plasma 6.2.0.
STEPS TO REPRODUCE
1. Open Blender (Bug happens even if Blender is closed while locking/sleep)
2. Lock Screen/Sleep through keyboard shortcut
3. Unlock screen, and try to click on the Blender viewport, or try to zoom
in/out using scrollwheel.
4. Try unfocusing Blender window, then refocusing and try to click or scroll in
the blender window.
OBSERVED RESULT
Blender will sometimes not respond to mouse clicks/scrolls and keyboard input
EXPECTED RESULT
Blender should respond to mouse clicks/scrolls and keyboard input when focused
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 6.2.2
KDE Frameworks Version: 6.7.0
Qt Version: 6.8.0
ADDITIONAL INFORMATION
Tested with Blender 4.2.3 Binary from the blender website, as well as Blender
4.2.2 LTS from the flatpak repos.
Does not happen in KDE X11.
A possibly related bug with Sway on the Blender bugtracker
https://projects.blender.org/blender/blender/issues/117225
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