https://bugs.kde.org/show_bug.cgi?id=510171
Bug ID: 510171
Summary: external display blank after wake-from-sleep
Classification: Plasma
Product: plasmashell
Version First 6.4.5
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Display Configuration widget and OSD
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: 1.0
Created attachment 185459
--> https://bugs.kde.org/attachment.cgi?id=185459&action=edit
kscreen-doctor output showing error state
SUMMARY
Using a Thinkpad T14 Gen5 laptop with a Caldigit TS3 dock and 2x Dell 4k
monitors, when waking from sleep I usually (not 100% though) need to remove
dock entirely and/or power cycle monitors to get both displays working. When my
primary display is not working, Plasma still sees it as connected and therefore
doesn't move windows and the taskbar back to the working display, so they're
just hidden.
STEPS TO REPRODUCE
1. While connected to dock with lid shut, allow laptop to go to sleep.
2. Open lid of laptop, wake from sleep and unlock plasma
3. Shut lid of laptop
OBSERVED RESULT
One external display lights up correctly, the other remains dark. Monitor shows
'No Signal', however plasma believes it's connected.
EXPECTED RESULT
Both monitors light up
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2
Kernel Version: 6.12.49-1-lts (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 PRO 8840U w/ Radeon 780M Graphics
Memory: 32 GiB of RAM (30.0 GiB usable)
Graphics Processor: AMD Radeon 780M Graphics
Manufacturer: LENOVO
Product Name: 21MCCTO1WW
System Version: ThinkPad T14 Gen 5
ADDITIONAL INFORMATION
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