https://bugs.freedesktop.org/show_bug.cgi?id=99418
--- Comment #26 from lei.pero@gmail.com --- (In reply to Michel Dänzer from comment #25)
So maybe it actually depends on whether mutter uses DRI3 or DRI2? You can test this by enabling DRI3 on the server side but (re-)starting mutter with
LIBGL_DRI3_DISABLE=1 mutter --replace
Yeah, result is smooth experience (and broken gnome-shell lol), I was convinced that same bahviour happens with other WM's, I remmember when using Ubuntu that there was same problem, but i was using custom gnome-flashback session, still was convinced same thing happened with compiz and metacity, obviously i should have tested it, not concluding from (erroneous) memory.
So, this is connected with mutter, and probably does not belong here but on gnome project bug report? Latter i will try some environment variables for clutter to investigate it further.