Status changed to invalid, as I was obviously not using GPU rendering
after applying some updates from Proposed. Did a clean 18.04 reinstall
and problem does not occur anymore.
** Changed in: compiz (Ubuntu)
Status: New => Invalid
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You received this bug notification because you are a me
Ok, I did some digging further and figured, that obviously the GPU is not being
used at all when OpenGL apps are run.
I launchend glmark2 and checked intel_gpu_top and top: While the GPU usage
remained at 0%, glmark2 sent the CPU usage to >200%.
So maybe this is not a Compiz bug then, however -
