https://bugs.kde.org/show_bug.cgi?id=460188
Bug ID: 460188
Summary: Switching out displays via xrandr crashes plasmashell
Classification: Plasma
Product: plasmashell
Version: master
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Multi-screen support
Assignee: plasma-b...@kde.org
Reporter: mira...@mirandastreeter.com
CC: aleix...@kde.org, notm...@gmail.com
Target Milestone: 1.0
Created attachment 152680
--> https://bugs.kde.org/attachment.cgi?id=152680&action=edit
Stack trace for plasmashell
SUMMARY
When attempting to switch out displays via xrandr (as in, disabling what's
enabled and enabling what's disabled), plasmashell hits a plasma-workspace
assertion error and causes a crash+coredump
STEPS TO REPRODUCE
1. Have more than one display
2. Have at least one display disabled
3. Switch out the displays via xrandr. For example:
```
xrandr --output DP-2 --off
xrandr --output HDMI-1 --mode 3840x2160 --rate 120.00
```
OBSERVED RESULT
Plasmashell crashes
EXPECTED RESULT
Plasmashell does not crash
SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version: 5.26.80
KDE Frameworks Version: 5.99.0
Qt Version: 5.15.6
ADDITIONAL INFORMATION
Kernel Version: 5.19.13-arch1-1 (64-bit)
Graphics Platform: X11
Mesa Version: 22.1.7
Attached is the relevant stacktrace, as it's rather long, but here's the
initial assertion error:
```
Oct 09 19:50:06 melchior kscreen_backend_launcher[1145]: kscreen.xrandr:
Emitting configChanged()
Oct 09 19:50:06 melchior plasmashell[4108]: Trying to use rootObject before
initialization is completed, whilst using setInitializationDelayed. Forcing
completion
Oct 09 19:50:06 melchior plasmashell[4108]: kf.service.services: The desktop
entry file "" has Type= "Application" but no Exec line
Oct 09 19:50:06 melchior plasmashell[4108]: ASSERT:
"view->containment()->screen() == id || view->containment()->screen() == -1" in
file
/home/<username>/.cache/yay/plasma-workspace-git/src/plasma-workspace/shell/shellcorona.cpp,
line 800
Oct 09 19:50:06 melchior plasmashell[4108]: 25 -- exe=/usr/bin/plasmashell
Oct 09 19:50:06 melchior plasmashell[4108]: 13 -- platform=xcb
Oct 09 19:50:06 melchior plasmashell[4108]: 11 -- display=:0
Oct 09 19:50:06 melchior plasmashell[4108]: 20 -- appname=plasmashell
Oct 09 19:50:06 melchior plasmashell[4108]: 17 -- apppath=/usr/bin
Oct 09 19:50:06 melchior plasmashell[4108]: 9 -- signal=6
Oct 09 19:50:06 melchior plasmashell[4108]: 9 -- pid=4108
Oct 09 19:50:06 melchior plasmashell[4108]: 19 -- appversion=5.26.80
Oct 09 19:50:06 melchior plasmashell[4108]: 19 -- programname=Plasma
Oct 09 19:50:06 melchior plasmashell[4108]: 31 --
bugaddress=sub...@bugs.kde.org
Oct 09 19:50:06 melchior plasmashell[4108]: 12 -- startupid=0
Oct 09 19:50:06 melchior plasmashell[4108]: KCrash: crashing...
crashRecursionCounter = 2
Oct 09 19:50:06 melchior plasmashell[4108]: KCrash: Application Name =
plasmashell path = /usr/bin pid = 4108
Oct 09 19:50:06 melchior plasmashell[4108]: KCrash: Arguments:
/usr/bin/plasmashell --no-respawn
Oct 09 19:50:06 melchior plasmashell[4108]: KCrash: Attempting to start
/usr/lib/drkonqi
Oct 09 19:50:06 melchior kwin_x11[913]: kwin_core: Failed to focus 0x4000b0
(error 3)
Oct 09 19:50:06 melchior kwin_x11[913]: kwin_core: Failed to focus 0x4000b0
(error 3)
Oct 09 19:50:06 melchior kwin_x11[913]: qt.qpa.xcb: QXcbConnection: XCB error:
3 (BadWindow), sequence: 14317, resource id: 4194333, major code: 15
(QueryTree), minor code: 0
Oct 09 19:50:06 melchior kwin_x11[913]: qt.qpa.xcb: QXcbConnection: XCB error:
3 (BadWindow), sequence: 14338, resource id: 4194480, major code: 15
(QueryTree), minor code: 0
Oct 09 19:50:06 melchior kwin_x11[913]: qt.qpa.xcb: QXcbConnection: XCB error:
3 (BadWindow), sequence: 14346, resource id: 4194423, major code: 15
(QueryTree), minor code: 0
Oct 09 19:50:06 melchior kwin_x11[913]: qt.qpa.xcb: QXcbConnection: XCB error:
3 (BadWindow), sequence: 14353, resource id: 4194365, major code: 15
(QueryTree), minor code: 0
Oct 09 19:50:06 melchior kded5[912]: Service "org.kde.StatusNotifierHost-4108"
unregistered
Oct 09 19:50:06 melchior kded5[912]: org.kde.plasma.dataengine.geolocation:
gpsd not found
Oct 09 19:50:06 melchior kded5[912]: "location"
Oct 09 19:50:07 melchior plasmashell[4108]: Unable to start Dr. Konqi
Oct 09 19:50:07 melchior plasmashell[4108]: Re-raising signal for core dump
handling.
```
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