https://bugs.kde.org/show_bug.cgi?id=451591
Bug ID: 451591
Summary: [kwin/display configuration] Multiple monitors with
same name cause unintentional behavior
Product: kwin
Version: 5.24.3
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: xrandr
Assignee: kwin-bugs-n...@kde.org
Reporter: parker.l.r...@gmail.com
Target Milestone: ---
Created attachment 147533
--> https://bugs.kde.org/attachment.cgi?id=147533&action=edit
Screenshot of fixed result
SUMMARY
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When using more than one display with the same EDID name and multiple different
rotations, display configuration will apply your changes but instantly think a
change was made so there are TWO apply steps.
Due to a hardware issue, sometimes my displays reconnect and the portrait
rotation from the right monitor is applied to the left making the left upside
down. I have to go in each time and reapply the rotation, apply twice, and then
close out.
Confirmed on two different AMD GPU systems with the same monitor layout (One
HDMI and two Displayport)
My fix was to create a specific EDID for each of the portrait monitors with
their own name. Image attached showing the result of the fix.
STEPS TO REPRODUCE
1. Have three monitors
2. Arrange in one landscape, one portrait, and one reverse portrait
3. Rotation applied incorrectly to one of the portrait montiors
OBSERVED RESULT
On display reconnect/resume, the wrong rotation is applied to one of the
portrait monitors due to the naming of the display being the same between all.
EXPECTED RESULT
Displays to be treated separately (possibly by serial/unique identifier based
on connection name)
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 5.24.3
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3+kde+r134-1
ADDITIONAL INFORMATION
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