https://bugs.freedesktop.org/show_bug.cgi?id=63732
--- Comment #2 from Honza Tvrznik flateric@atlas.cz --- I must say that I don't have any problem with kwin (but kwin is too slow for me). This bug is present only when I'am using kwin_gles.
Maybe this bug: https://bugs.freedesktop.org/show_bug.cgi?id=61600 is like this one, but, for intel driver.
Parts of dmesg and full Xorg.0.log attached.