https://bugs.kde.org/show_bug.cgi?id=400138
Bug ID: 400138
Summary: Desktop cube animation with blur desktop effect
creates blurred rectangular artifact in upper screen
quadrant
Product: kwin
Version: 5.14.1
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: effects-various
Assignee: kwin-bugs-n...@kde.org
Reporter: hugh.ga...@tutamail.com
Target Milestone: ---
Created attachment 115820
--> https://bugs.kde.org/attachment.cgi?id=115820&action=edit
Screen grab of the described rectangular blur artifact during desktop cube
animation
SUMMARY
First bug report.
I use the desktop cube animate desktop effect to switch between virtual
desktops.
Since the updated blur modifications introduced in Plasma 5.13 (I think) using
desktop cube in combination with the blur desktop effect has led to the upper
right quadrant of the screen blurring during transition from one virtual destop
to another.
Disable the blur desktop effect and the upper right quadrant does not blur
during virtual desktop transition via the desktop cube animation.
STEPS TO REPRODUCE
1. Enable desktop cube desktop effect in System Settings > Desktop Effects
2. Select the desktop cube animation in System Settings > Virtual Desktops
3. Enable the blur desktop effect in System Settings > Desktop Effects
4. Trigger desktop cube animation by moving from one virtual desktop to another
OBSERVED RESULT
There is a rectangular region in the upper right quadrant of the screen that
blurs.
Screen grab of this rectangular region blur is attached.
EXPECTED RESULT
This rectangular region of the screen should not blur during virtual desktop
transition.
Looks like it may be a hidden region used in desktop cube animation being
mistakenly blurred.
Disabling the blur desktop effect is a workaround, but then I am unable to use
blur in other parts of my system.
SOFTWARE VERSIONS
Distro: Manjaro
KDE Plasma Version: 5.14.1
KDE Frameworks Version: 5.51
Qt Version: 5.11.2
ADDITIONAL INFORMATION
Using an intel onboard gpu using standard i915 driver with xorg-server 1.20.2.
This issue was introduced in 5.13 and is still present in 5.14.1.
Looked for a similar bug before creating this, did not find one.
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