https://bugs.kde.org/show_bug.cgi?id=365298

            Bug ID: 365298
           Summary: Flickering display / compositor problem
           Product: plasmashell
           Version: 5.6.5
          Platform: Archlinux Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: k...@davidedmundson.co.uk
          Reporter: m...@op.pl
                CC: bhus...@gmail.com, plasma-b...@kde.org

Display shows previous and last frames of animation switching between them
randomly.
Example: moving cursor in Dolphin suddenly starts alternating highlights
between two files.
Another example: after writing some text in Vim I see that text appearing and
disappearing.

Video of unminimizing animation when this happened - looks like it started
alternating between two last frames of animation → https://youtu.be/SpZdhF2WVXM

Happens from time to time… every 5 or 15 minutes maybe.
Started happening with Plasma 5.6.5.
Clicking on background image or other kind of interaction with the environment
usually fixes the problem.

Reproducible: Always

Steps to Reproduce:
Do your usual stuff and wait patiently. ;-)



Two monitor setup - one is notebook display - 2.5K, second is external 4K
display. Compositor effects are enabled.
Plasma version is 5.6.5.
Qt version is 5.7.
Graphics card: Intel Corporation Broadwell-U Integrated Graphics (rev 09)
Notebook type: Levono X1 Carbon (version 3)

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