https://bugs.kde.org/show_bug.cgi?id=502626

            Bug ID: 502626
           Summary: visual artefacts on screen after screen turns back on
    Classification: Plasma
           Product: plasmashell
           Version: 6.3.4
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: plasma-b...@kde.org
          Reporter: vkr...@yahoo.com
                CC: k...@davidedmundson.co.uk
  Target Milestone: 1.0

I have configured my monitor's power settings to automatically turn off (go
blank) after 5 minutes (System Settings->Power Management, Display and
Brightness,  Turn off screen: 5 min).

After upgrading my openSUSE 15.6 desktop to Plasma 6.3.4 from OBS, there are
visual artefacts on the screen after it comes back on  - as a result of a key
press or mouse move -  after turning off after a period of inactivity. See
attached screenshot - red arrows point to the "artrfacts".  If I perform any
action that causes some UI change, like resize a window or right-click to
display context menu, etc - then the window with the artefacts gets repainted
and they disappear.

This has never happened prior to upgrade to Plasma 6.3.4 (from 6.3.3).

Operating System: openSUSE Leap 15.6
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.12.0
Qt Version: 6.9.0
Kernel Version: 6.4.0-150600.23.47-default (64-bit)
Graphics Platform: X11
Processors: 32 × AMD Ryzen 9 5950X 16-Core Processor
Memory: 125.7 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 4060 Ti
Manufacturer: ASUS

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