https://bugs.kde.org/show_bug.cgi?id=455213
Bug ID: 455213
Summary: Dropdown Menus render at incorrect positions on
Multimonitor with Fractional Scaling
Product: kwin
Version: 5.24.5
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: kdeb...@scmaruthi.trumail.one
Target Milestone: ---
SUMMARY
Dropdown Menus and Boxes are drawn at incorrect positions when there is
Fractional Scaling and Multiple monitors and different levels of scaling.
On a triple monitor system moving between monitors 1->3 going left to right:-
It renders fine on the first monitor.
Now moving the Window to the second monitor, the moment the window is full
inside the second screen all the dropdown boxes are rendered in the skewed
point. It renders fine as long as a part of the window exists on the first
monitor.
The Matter becomes worse when moving the window to the third monitor cause now
the skewed point is further to the right and the dropdown box cannot be seen.
STEPS TO REPRODUCE
1. Set Kwin to use Wayland
2. Setup Dual/Triple Monitors
3. Set the Scaling factor to a value sub 100 preferably not divisible.
4. Open an application with a dropdown box.
5. Click on Dropdown box while the Window is place on each monitor
OBSERVED RESULT
The Dropdown Box renders in different positions not directly under the expected
dropdown point
Moving further and further away everytime you move the window right
EXPECTED RESULT
The Dropdown Box should open directly below the Dropdown button.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 5.24.5
(available in About System)
KDE Plasma Version: 5.24.5
KDE Frameworks Version: 5.94.0
Qt Version: 5.15.4
ADDITIONAL INFORMATION
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