https://bugs.kde.org/show_bug.cgi?id=496720
Bug ID: 496720
Summary: Display shows as attached even though it has been
physically disconnected
Classification: Plasma
Product: kwin
Version: 6.2.3
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: ondrej.m...@seznam.cz
Target Milestone: ---
SUMMARY
After Thunderbolt dock is disconnected with laptop lid closed, the screen
sometimes shows up as connected (shown in kscreen). Logging out and logging
back in fixes the issue. I cannot reproduce this bug every time, but happens
quite often (at least 1 out of 10 tries). As a result, laptop does not go to
sleep and drains the battery. Also, when the dock is reconnected, the display
stays black. I think the bug must have been introduced with plasma 6.2.0 or
later, I'm pretty sure I did not encounter it in 6.1.x.
STEPS TO REPRODUCE
1. Have laptop connected to a Thunderbolt dock (I used Thinkpad dock gen 2)
2. Have a monitor connected to the dock (I had Gigabyte M2ýQ over HDMI)
3. Close the lid of the laptop
4. Disconnect the monitor
5. Open up the laptop and evaluate
OBSERVED RESULT
The monitor shows up as connected
EXPECTED RESULT
The monitor does not show up
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 40
KDE Plasma Version: 6.2.3
KDE Frameworks Version: 6.8.0
Qt Version: 6.7.2
Kernel Version: 6.11.8-200.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i5-8350U CPU @ 1.70GHz
Memory: 31.2 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
Manufacturer: LENOVO
Product Name: 20L6SJAC00
System Version: ThinkPad T480
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