https://bugs.kde.org/show_bug.cgi?id=525922
Bug ID: 525922
Summary: plasmashell loses panel and desktop containments after
resuming from suspend on X11 with Intel Arc (xe
driver)
Classification: Plasma
Product: plasmashell
Version First 6.7.5
Reported In:
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Screen locking
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: 1.0
Upon waking from sleep (suspend), the HDMI connection briefly registers a
disconnect/reconnect cycle (XRandR RRNotify_OutputChange).
Plasmashell does not crash, but screenCount drops to 0, emitting:
"requesting unexisting screen available rect -1"
The panel and wallpaper disappear completely and never return unless
plasmashell is restarted.
### System Information:
• Distribution: openSUSE Tumbleweed (release 20260915)
• KDE Plasma Version: 6.7.5
• Session Type: X11 (startplasma-x11)
• Kernel Version: 7.2.5-1-default
• GPU: Intel Corporation Battlemage G21 [Arc B580]
• Kernel Driver: xe
• Display Configuration: Single 1080p monitor connected via HDMI (HDMI-3 @
75Hz)
──────
### Steps to Reproduce:
1. Log into a KDE Plasma 6 session on X11 with an Intel Arc GPU (using the xe
kernel driver).
2. Put the computer to sleep (Suspend).
3. Wake / resume the system from sleep (or allow the monitor to wake up from
DPMS power saving).
──────
### Observed Result:
• During the resume phase, the HDMI link briefly renegotiates, causing XRandR
to report an instantaneous disconnect/reconnect cycle (Disconnected followed by
Connected).
• plasmashell does not crash (no SIGSEGV / coredump is generated; DrKonqi is
not triggered).
• However, plasmashell drops its internal screen references:
• Evaluating qdbus6 org.kde.plasmashell /PlasmaShell
org.kde.PlasmaShell.evaluateScript "print(screenCount)" returns 0.
• The panel and desktop containments are completely unmapped/destroyed.
• In wmctrl -l, both plasmashell and Desktop @ QRect(...) windows vanish.
• The panels and desktop wallpaper never return automatically unless
plasmashell is manually restarted.
──────
### Expected Result:
plasmashell should detect the reconnected output via XRandR/KScreen and
rebuild or remap the panels and desktop containment views onto the restored
screen.
──────
### Relevant Journal Logs:
During wake-up, KScreen launcher notes the rapid output change:
kscreen_backend_launcher: RRNotify_OutputChange
kscreen_backend_launcher: Output: 70
kscreen_backend_launcher: Connection: "Disconnected"
...
kscreen_backend_launcher: Output 70 : connected = false , enabled = true
...
kscreen_backend_launcher: RRNotify_OutputChange
kscreen_backend_launcher: Output: 70
kscreen_backend_launcher: Connection: "Connected"
Immediately afterward, plasmashell logs:
plasmashell[PID]: requesting unexisting screen available rect -1
At this point:
• KWin still sees the screen correctly (Number of Screens: 1 (HDMI-3)).
• kscreen-doctor -o and xrandr see the connected output.
• Only plasmashell remains in a zombie state with screenCount: 0.
──────
### Current Workaround:
Restarting plasmashell via systemctl --user restart
plasma-plasmashell.service (or plasmashell --replace) restores the desktop and
panels immediately.
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