https://bugs.kde.org/show_bug.cgi?id=407024
Bug ID: 407024
Summary: Panel texture flickering
Product: plasmashell
Version: 5.15.4
Platform: Kubuntu Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: k...@davidedmundson.co.uk
Reporter: andy...@mail.ru
CC: plasma-b...@kde.org
Target Milestone: 1.0
SUMMARY
I noticed texture flickering in a few cases.
STEPS TO REPRODUCE
Scenario 1.
1. Create a horizontal panel with a few application icons.
2. Move the mouse over the icons on the panel. Try moving fast enough so that
tooltips with the icon name don't appear.
Scenario 2.
1. Invoke logout/reboot/shutdown effect.
OBSERVED RESULT
Scenario 1.
The panel texture is flickering. I can see its opacity vary, as well as
contents jitter during the flickering.
Scenario 2.
The screen dimming effect of the logout/reboot/shutdown animation has
flickering opacity. After the animation completion, sometimes the effect
darkens the desktop contents more than usual, and then after a fraction of a
second (or maybe after I move the mouse) opacity gets restored to usual (which
looks like desktop contents become less darkened).
While the animation is in progress, the logout/reboot/shutdown icons flicker.
EXPECTED RESULT
No flickering should happen.
SOFTWARE/OS VERSIONS
Linux: Kubuntu 19.04
KDE Plasma Version: 5.15.4
KDE Frameworks Version: 5.56.0
Qt Version: 5.12.2
Mesa: 19.0.2
X.org: 1.20.4
ADDITIONAL INFORMATION
I'm seeing this on a laptop with Intel Haswell iGPU (i915 driver).
I've also seen the problem with logout/reboot/shutdown effect on a different
machine, also with Kubuntu 19.04, but with Nvidia GPU (430.09 driver). Not the
panel flickering, though.
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