https://bugs.kde.org/show_bug.cgi?id=374393

            Bug ID: 374393
           Summary: Radeon: Freeze for long periods, until an action like
                    Alt+Shift+F12 wakes it up
           Product: plasmashell
           Version: 5.8.4
          Platform: Debian testing
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Panel
          Assignee: plasma-b...@kde.org
          Reporter: nuor...@gmail.com
  Target Milestone: 1.0

On 2 laptops with Radeon graphics, all things related to Plasma panel (taskbar,
clock, launcher, tray) freeze for an indefinite period of time; actually hang,
they may start working again. The processor usage stays at 0, and Plasma can
also be triggered to work correctly again:
- press Ctrl+Alt+F1 and Ctrl+Alt+F7 again
- press Alt+shift+f12 to change compositing settings
- restart process plasmashell

Other functions appear to work correctly (Alt+Tab switches windows correctly,
Alt+CapsLock switches the input language, although the indicator remains
still).

May be Radeon related, doesn't happen on other computers with Intel or Nvidia
graphics. Also seems more likely to happen if an video is displayed in a
browser, but may not be relevant.

Both on Debian Testing and Unstable.

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