https://bugs.kde.org/show_bug.cgi?id=495223
Bug ID: 495223
Summary: Monitor descriptions not updated if monitor switched
while suspended
Classification: Plasma
Product: KScreen
Version: 6.2.1
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: common
Assignee: kscreen-bugs-n...@kde.org
Reporter: creideiki+kdeb...@ferretporn.se
Target Milestone: ---
Created attachment 175129
--> https://bugs.kde.org/attachment.cgi?id=175129&action=edit
Screenshot of Brightness and Colour widget, reporting 2 actual HP monitors as 1
Dell and 1 HP
SUMMARY
I often move a laptop between two USB-C docks, each with external monitors
attached via DisplayPort. While troubleshooting all the brightness issues that
appeared in Plasma 6.2, I noticed that after moving between docks, the monitor
descriptions in KScreen still show the old monitors.
STEPS TO REPRODUCE
1. Connect to a USB-C dock with 1 external display from Dell.
2. Suspend to RAM.
3. Disconnect from the dock.
4. Connect to another dock, with 2 external displays from HP.
5. Wake up from suspend.
6a. Click the "Brightness and Colour" widget.
6b. Alternatively, click "Display Configuration" in the system tray and then
"Configure Display Settings..."
6c. Alternatively, run the following commands:
qdbus-qt6 org.kde.ScreenBrightness /org/kde/ScreenBrightness
org.kde.ScreenBrightness.DisplaysDBusNames
take the display numbers for the external monitors from the output and use them
as X and Y in the following:
qdbus-qt6 org.kde.ScreenBrightness /org/kde/ScreenBrightness/displayX
org.kde.ScreenBrightness.Display.Label
qdbus-qt6 org.kde.ScreenBrightness /org/kde/ScreenBrightness/displayY
org.kde.ScreenBrightness.Display.Label
OBSERVED RESULT
Of the two external monitors, one label shows the old Dell monitor, which is no
longer connected. The other label shows the correct HP monitor.
EXPECTED RESULT
The labels should reflect the hardware actually plugged in to the system, even
after the hardware changes.
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 40
KDE Plasma Version: 6.2.1
KDE Frameworks Version: 6.7.0
Qt Version: 6.7.2
Kernel Version: 6.10.12-200.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 12 × 12th Gen Intel® Core™ i7-1255U
Memory: 31.0 GiB of RAM
Graphics Processor: Mesa Intel® Graphics
ADDITIONAL INFORMATION
Laptop is a Lenovo ThinkPad T14 Gen 3, model 21AH00CSMX. Docks are both Lenovo
ThinkPad Universal USB-C Docks, model 40AY.
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