https://bugs.kde.org/show_bug.cgi?id=406970
Bug ID: 406970
Summary: kwin_x11 crashes when switching virtual desktops
Product: kwin
Version: 5.15.3
Platform: Other
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: jaakko.lutti...@iki.fi
Target Milestone: ---
SUMMARY
STEPS TO REPRODUCE
1. Enable System settings -> Desktop behaviour -> Virtual desktops -> Show
on-screen display when switching.
2. Switch from one virtual desktop to another.
OBSERVED RESULT
Kwin crashes and goes back to the original virtual desktop.
EXPECTED RESULT
Virtual desktop changes and Kwin continues working without crashing.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: NixOS 19.09.git.dfd8f84
(available in About System)
KDE Plasma Version: 5.15.3
KDE Frameworks Version: 5.57.0
Qt Version: 5.12.0
ADDITIONAL INFORMATION
Logs in journalctl between two consecutive crashes:
```
Apr 26 11:38:11 leevi xsession[2802]: KCrash: Application 'kwin_x11'
crashing...
Apr 26 11:38:11 leevi xsession[2802]: qt.qpa.xcb: QXcbConnection: XCB error: 3
(BadWindow), sequence: 178, resource id: 56623111, major code: 20
(GetProperty), minor code: 0
Apr 26 11:38:11 leevi xsession[2802]: qt.qpa.xcb: QXcbConnection: XCB error: 3
(BadWindow), sequence: 179, resource id: 56623111, major code: 20
(GetProperty), minor code: 0
Apr 26 11:38:11 leevi X[2653]: (II) modeset(0): EDID vendor "LGD", prod id 803
Apr 26 11:38:11 leevi X[2653]: (II) modeset(0): Printing DDC gathered
Modelines:
Apr 26 11:38:11 leevi X[2653]: (II) modeset(0): Modeline "1920x1080"x0.0
138.00 1920 1952 1988 2088 1080 1085 1090 1102 -hsync -vsync (66.1 kHz eP)
Apr 26 11:38:11 leevi xsession[2802]: qt.qpa.xcb: QXcbConnection: XCB error: 3
(BadWindow), sequence: 1242, resource id: 56623127, major code: 3
(GetWindowAttributes), minor code: 0
Apr 26 11:38:11 leevi xsession[2802]: qt.qpa.xcb: QXcbConnection: XCB error: 9
(BadDrawable), sequence: 1243, resource id: 56623127, major code: 14
(GetGeometry), minor code: 0
Apr 26 11:38:12 leevi xsession[2802]: Application::crashHandler() called with
signal 11; recent crashes: 2
Apr 26 11:38:13 leevi xsession[2802]: KCrash: Application 'kwin_x11'
crashing...
```
Not sure if this is a problem in kwin or NixOS. Here's an issue on NixOS side
for reference: https://github.com/NixOS/nixpkgs/issues/60312
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