https://bugs.freedesktop.org/show_bug.cgi?id=97059
--- Comment #5 from smoki smoki00790@gmail.com ---
I reproduced this on current Debian Sid and Kabini with current distro packages, same blender as Michel's.
LIBGL_DRI3_DISABLE=1 fixes it, but...
But it is tricky one, it has something to do with vsync it seems, as also is not reproducable with vblank_mode=3 , but with vblank_mode=0 it is there :)