[kde] [Bug 417528] New: Major Screen tearing on intel graphics kde 5.18

[TF]

https://bugs.kde.org/show_bug.cgi?id=417528

            Bug ID: 417528
           Summary: Major Screen tearing on intel graphics kde 5.18
           Product: kde
           Version: unspecified
          Platform: Ubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: tamerfadli at gmail.com
  Target Milestone: ---

Operating System: Kubuntu 19.10
KDE Plasma Version: 5.18.0
KDE Frameworks Version: 5.67.0
Qt Version: 5.12.4
Kernel Version: 5.3.0-29-generic
OS Type: 64-bit
Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz
Memory: 7.5 GiB of RAM

Intel Corporation UHD Graphics 620
enable compositor on startup checked
scale method accurate
rendering backend opengl 3.1
tearing prevention "vsync"
key window thumbnails only for shown windows
allow applications to block compositing checked

Section "Device"
 Identifier "Intel Graphics"
 Driver "Intel"
 Option "AccelMethod" "sna"
 Option "TearFree" "true"
EndSection

only started after upgrade to kde 5.18
selecting on the desktop causes the wallpaper to flash black until wallpaper
disappears altogether
panel tears as well

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