I have strange results few notes first, 3.8-ati is 3.8.5 kernel + reverted 62444b7462a2b98bc78d68736c03a7c4e66ba7e2 3.9-rc5_patched is 3.9-rc5 with your latest patch 3.8 - ubuntu vanilla 3.8.5 so, here is all results: 1) cold boot, boot 3.9-rc5_patched - same screen as with 3.8 (bad) 2) boot macosx, reboot, boot 3.9-rc5_patched - same screen as with 3.8 3) boot 3.8-ati, reboot, boot 3.9-rc5_patched - result like on previous screenshot I've posted, horizontal shift is always different I didnt test 3.9 with your first patch with all cases.