https://bugs.freedesktop.org/show_bug.cgi?id=102054

            Bug ID: 102054
           Summary: KDE desktop compositing occasionally causes flickering
                    and frozen window contents
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati@lists.x.org
          Reporter: sonichedgehog_hyperblas...@yahoo.com
        QA Contact: xorg-t...@lists.x.org

KDE desktop compositing occasionally causes strange visual artifacts. This
includes the following problems, which may or may not be related:

- Certain panels flicker when rendering against other panels, which looks as if
the two are z-fighting. I often see this with Skype notifications in the system
tray as they interfere with the Plasma panel.

- The Plasma desktop no longer executes visual updates unless the user does an
action that forces it to. For example: If you have an analog clock with the
seconds hand enabled, you will notice that it's stuck and the hands aren't
moving any longer... however if you switch desktops to force a redraw, the
hands will move to represent the current time but only once at that moment.
This problem is rare and always goes away after toggling desktop compositing.

- The contents of certain windows are no longer updated, and a past version of
the window is drawn instead. I often think the application has frozen until
turning off desktop effects and seeing that it updates again. This problem is
rare and always goes away after toggling desktop compositing.

Since I don't know how much this is a KDE problem and how much it's the
drivers, I'm reporting it with both of the teams. My OS is openSUSE Tumbleweed
x64. Plasma 5.10.4, MESA 17.1.5, Kernel 4.11.8. My CPU is an Intel core i7 920,
my video card is a Radeon R7 370 from Gigabyte (RadeonSI / GCN 1.0 / Pitcairn
Islands) and I'm running the 'radeon' driver (no 'amdgpu' support yet).

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