https://bugs.kde.org/show_bug.cgi?id=515289
Bug ID: 515289
Summary: KWin Doesn't Notice Monitor has Changed While it was
Sleeping
Classification: Plasma
Product: kwin
Version First 6.4.5
Reported In:
Platform: Kubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: multi-screen
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
I have a laptop which I use with a monitor at home, and a monitor at work, and
I basically never use the screen of the laptop. If I'm at home and I put the
laptop to sleep, then unplug it, carry it to work, plug it in, and then wake it
up, it still uses the settings from my home monitor (like the UI scale). If I
go to the "Display Configuration" section in the settings panel, it will even
list the name of the home monitor while I'm at work.
This can be avoided by waking the laptop without a monitor first, waiting for
it to reconfigure, then plugging the monitor in. Both my home and work monitors
are plugged in via USB-C through a hub.
STEPS TO REPRODUCE
1. Plug laptop into one monitor and close screen.
2. Note the name of the monitor in the settings panel
3. Set the scale to 200% or something obvious
4. Suspend the laptop
5. Without waking the laptop, unplug the monitor, and plug the laptop into a
different monitor
6. Wake the laptop (in this my case by opening and closing the lid)
OBSERVED RESULT
Notice that the settings panel lists the old monitor's name, and is still using
200% scale. If you change that setting, it will be saved for the old monitor in
the settings.
EXPECTED RESULT
It would list the currently attached monitor and use the settings from that
monitor.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 25.10
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
ADDITIONAL INFORMATION
I'm on wayland
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