https://bugs.kde.org/show_bug.cgi?id=442973
Bug ID: 442973
Summary: Screen corner highlighting effect does not get
triggered in some situations
Product: kwin
Version: 5.22.90
Platform: Other
OS: Other
Status: REPORTED
Severity: minor
Priority: NOR
Component: effects-various
Assignee: kwin-bugs-n...@kde.org
Reporter: kishor...@gmail.com
Target Milestone: ---
Created attachment 141919
--> https://bugs.kde.org/attachment.cgi?id=141919&action=edit
[OBSERVED RESULT B] A thin line near the bottom edge is skipped while
highlighting the screen edge.
SUMMARY
The 'Screen edge' highlighting effect is not triggered if one approaches a
screen corner from a particular direction (see reproduction steps).
STEPS TO REPRODUCE
1. In Settings > Workspace Behaviour > Screen edges, bind any action to the
lower left corner of the screen
2. In Settings > Workspace Behaviour > Desktop effects, enable 'Screen Edge'
and apply changes.
3. Bring your mouse to the bottom edge of the screen (somewhere in the middle,
not near the corner)
4. Slowly move it to the bottom-left corner while hugging the bottom edge
5. When you reach close to the bottom-left corner, move the mouse slightly up
6. Move the mouse down again.
OBSERVED RESULT
A. The bottom-left screen corner is not highlighted after step 4, no matter how
close one is to the bottom-left. The highlighting only comes into effect after
step 5. The highlighting disappears again after step 6.
B. (Possibly related observation) When the bottom-left screen corner is
highlighted, note that the highlight is vertically displaced upwards from the
screen corner. See the attached image, where there is a thin un-highlighted
area on the bottom edge.
EXPECTED RESULT
Screen highlighting should be activated properly no matter how one approaches
the screen edge.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.22.90
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2
Kernel Version: 5.10.63-1-lts (64-bit)
Graphics Platform: X11
Processors: 8 × AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx
Memory: 21.5 GiB of RAM
Graphics Processor: AMD Radeon™ Vega 8 Graphics
ADDITIONAL INFORMATION
A. Screen corner highlighting is only triggered consistently on the top-left
corner on my machine. The bottom-left corner shows the behaviour described in
this bug, while it seems to be impossible to actually get the two corners on
the right to be highlighted.
B. The actual effect bound to the particular corner is always reliably
triggered.
C. Also reproducible on KDE Neon unstable.
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