https://bugs.kde.org/show_bug.cgi?id=479293
Bug ID: 479293
Summary: Multi-monitor Wayland surface does not extend to the
left (Plasma 6)
Classification: Plasma
Product: kwin
Version: git master
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-drm
Assignee: kwin-bugs-n...@kde.org
Reporter: stefan.hoffmeis...@econos.de
Target Milestone: ---
SUMMARY
In a Wayland multi-monitor setup where the non-primary screen is to the _left_
of the primary screen ("extend to the left"), the content is overlapped into
the primary screen.
In ASCII art, for
* left non-primary == 2.5K resolution
* primary == 4K resolution
this looks like
```
+---------------------+--------+
| <left non-primary> | |
|---------------------+ |
| |
| <primary> |
+------------------------------|
```
Extending to the right works as expected. This also holds true for a triple
monitor setup, where one screen extends to the left and one screen extends to
the right of the primary screen.
"Display Configuration" shows the intended (correct) layout.
This may be an artefact of running KDE Plasma 6 b2+ (git master) under VMware
Workstation / vmwgfx with `export KWIN_DRM_NO_AMS=0`
STEPS TO REPRODUCE
1. create a multi-monitor setup
2. "physically" place at least one screen to the left of the primary screen
3. use "Display Configuration" to assert that physical left screen is logically
placed to extend the primary screen to the left (i.e. vertically aligned at the
top, offset to the left by resolution of secondary screen)
OBSERVED RESULT
Left screen overlaps primary screen as in ASCII art diagram above.
EXPECTED RESULT
Left screen extends desktop to the left.
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