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Thanks for the hint, though I'm facing the issue on Ubuntu only (on Windows, everything seems fine). I think I've made the same investigation before, but to no avail.

HW_COMPOSITING says "unavailable by default: Hardware compositing is disabled", and OPENGL_COMPOSITING something similar. This corresponds with my experience of jumpy scrolling and Youtube making the the fans go berserk.

But apparently, WebGL isn't affected by this and performs okay.




If you use KDE, try disabling compositing with Shift+Alt+F12.


I'm on Unity (and probably Gnome Shell sooner or later).




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