https://bugs.freedesktop.org/show_bug.cgi?id=63599
--- Comment #20 from wojtek wojtask9@wp.pl --- yeah :) with vramlimit=16 xeyes works perfect :). KDM (4.10.5) is working (without artifacts).
kernel-3.11-rc1 from(http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-fixes-3.11)
I'll do more tests later