https://bugs.kde.org/show_bug.cgi?id=443452
Bug ID: 443452
Summary: [Wayland] Cursor position is offset when going over
various actions on multi monitor and multi scaling
setup
Product: kwin
Version: 5.22.90
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: tony+...@stipanic.ch
Target Milestone: ---
SUMMARY
When having a multi monitor setup with at least two monitors which both have
different scaling, the cursor seems to not keep the offset correctly. When
hovering over various actions like links, draggable lines, etc. the offset
always changes. This only happens to one of two monitors. For example, if one
monitor is scaled 200%, no jumping happens. But trying to use a 100% second
monitor makes the cursor jump a lot.
This seems to be a lot worse for the user using the monitor. When trying to
record the screen, the recording seems to be less severe. For this reason,
there is a phone recording to show the effect better.
This happens on Wayland. The jumping happens on both XWayland as well as Native
Wayland programs.
STEPS TO REPRODUCE
1. Have one monitor be scaled 200% (for example HIDPI monitor). Have the other
monitor be scaled 100% (non-HIDPI).
2. Open any program - easiest to test with Firefox on a website
3. Move the mouse around on a non-HIDPI monitor.
OBSERVED RESULT
The mouse jumps around and you can click on objects the mouse isn't visually
on.
EXPECTED RESULT
The cursor doesn't jump around. For example when moving down, the cursor only
moves on the y-axis.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Endeavour OS, using kde-unstable repo
KDE Plasma Version: 5.22.90
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2
ADDITIONAL INFORMATION
None
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