https://bugs.kde.org/show_bug.cgi?id=499266
Bug ID: 499266
Summary: Taskbar disappears after idle/display outputs change
Classification: Plasma
Product: plasmashell
Version: 6.2.5
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Panel
Assignee: plasma-b...@kde.org
Reporter: ja...@okonski.org
CC: niccolo.venera...@gmail.com
Target Milestone: 1.0
SUMMARY
Plasma taskbar disappears after turning the display back on.
STEPS TO REPRODUCE
1. Use an HDMI display
2. Set the taskbar panel Visbility to auto hide (not sure if it's relevant)
3. Enable Turn off screen in Power Management, but disable Suspending
4. Go idle for a while until the screen turns off
5. Turn off the display physically if it doesn't do so on its own (mine does
after 15min of no signal being received)
6. Wait a little while for good measure
7. Turn the screen on, then wake the computer up
OBSERVED RESULT
Half the time, Plasma taskbar doesn't show up anymore, the start menu works
when pressing Super but the only way to bring plasma widgets back is `systemctl
--user restart plasma-plasmashell`.
EXPECTED RESULT
Plasma widgets should be there as normal
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: NixOS 25.05
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.1
Nvidia: 565.77
ADDITIONAL INFORMATION
I'm guessing this is caused by the HDMI display not reporting its resolution
anymore when it powers down for real. It's an LG G2 TV.
KWin does have other issues with my HDMI displays, like it sometimes won't
remember what refresh rate I'd chosen and defaults to 60. I don't have any
displayport displays to test at the moment.
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