Bug ID: 391486
           Summary: Nvidia 340x drivers - KWin Compositor won't use OpenGL
           Product: kwin
           Version: 5.12.3
          Platform: Archlinux Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: compositing
  Target Milestone: ---

OpenGL 2.0 and OpenGL 3.1 stopped working as the compositor backend after an
update. XRender does work.

When attempting to set the compositor backend in System Settings | Hardware |
Display and Monitor | Compositor, it appears to set correctly (i.e: no errors
are prompted), however


[user@host ~]$ qdbus org.kde.KWin /KWin supportInformation | grep -i compos 
Composite: yes; Version: 0x4
compositingMode: 1
useCompositing: true
compositingInitialized: true
windowsBlockCompositing: true
Compositing is active
Compositing Type: XRender


I'm not able to enable certain desktop effects such as Magic Lamp, Wobbly
Windows, etc, so it's obvious XRender is actually in use.

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