https://bugs.freedesktop.org/show_bug.cgi?id=64850
--- Comment #26 from Alex Deucher agd5f@yahoo.com --- Created attachment 84273 --> https://bugs.freedesktop.org/attachment.cgi?id=84273&action=edit possible fix 1/2
seems to be a problem with the line buffer setup on certain boards. Please try this patch set.