https://bugs.kde.org/show_bug.cgi?id=500757
Bug ID: 500757
Summary: Dragging a Window at Top of Screen causes Hard Freeze
Classification: Plasma
Product: kwin
Version: 6.3.1
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: Hotcorners and edges
Assignee: kwin-bugs-n...@kde.org
Reporter: b.w.p...@outlook.com
Target Milestone: ---
SUMMARY
Plasma hard and complete freeze/lock up while dragging a window along the top
edge of the desktop on Wayland. This has happened on both 6.3.0 and now 6.3.1.
It seems to be the maximize detection code (even if disabled) that is
triggering this. With it enabled I can visually see the maximize feedback
trigger when it locks, while with it disabled the mouse and window stutter and
slow way down until you pull the window back down. After 3-6 maximize attempts
(because dragging horizontally across the top edge is difficult without
accidentally pulling the window off the top of the screen) is when it locks.
STEPS TO REPRODUCE
1. With or without "Windows dragged to top edge" set, have a window snapped
(non-tiling) to top of screen.
2. Drag the window left and right not leaving the snapped top but occasionally
your mouse may try to pull the window slightly above the top of the window (as
if triggering a top edge maximize even if that is disabled).
3. After 3-5 seconds of back and forth movement (like you are trying to
position it precisely where you want it and triggering the maximize detection
code several times), the screen freezes.
OBSERVED RESULT
The screen completely locks up. Mouse and keyboard unresponsive so unable to
get any logs or restart kwin. Have to hard power off/on.
EXPECTED RESULT
Not lock up but continue to allow moving the window.
SOFTWARE/OS VERSIONS
Windows:
macOS:
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma:
KDE Plasma Version: 6.3.1
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.13.4-1-default (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 9 7940HS w/ Radeon 780M Graphics
Memory: 54.7 GiB of RAM
Graphics Processor: AMD Radeon 780M
ADDITIONAL INFORMATION
4K with 125% screen scaling.
Happens on a machine that was upgraded from 6.2 to 6.3, and on a machine with a
brand new install.
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