Bug 441625 - Visual glitches for a moment when editing list of virtual desktops
Summary: Visual glitches for a moment when editing list of virtual desktops
Status: CONFIRMED
Alias: None
Product: kwin
Classification: Plasma
Component: general (show other bugs)
Version: git master
Platform: Neon Linux
: NOR minor
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-08-27 20:10 UTC by Alexander Potashev
Modified: 2021-09-30 13:24 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In:
vlad.zahorodnii: Wayland-
vlad.zahorodnii: X11+

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Description Alexander Potashev 2021-08-27 20:10:34 UTC 
SUMMARY
Black screen for a moment when editing list of virtual desktops.

STEPS TO REPRODUCE
1. Open virtual desktops KCM
2. Add another virtual desktop
3. Click Apply

OBSERVED RESULT
Black screen for 1 second, then it restores. Not sure when happens, maybe Plasma restarts.

EXPECTED RESULT
Should only have immediate effect on the Virtual Desktops Pager widget.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Neon
(available in About System)
KDE Plasma Version: 5.22.80
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.3

ADDITIONAL INFORMATION
X; xcb
Comment 1 Nate Graham 2021-08-28 02:18:41 UTC 
Cannot reproduce exactly, but there are a few flickers for me with the panel and window decorations though. Seems like KWin reloads some stuff when it creates a new virtual desktop, which is causing these momentary visual glitches.
Comment 2 Alexander Potashev 2021-08-31 20:20:42 UTC 
> Black screen for 1 second, then it restores.

Fun fact: the same doesn't happen for me on Wayland.