https://bugs.freedesktop.org/show_bug.cgi?id=73530
--- Comment #70 from Alex Deucher alexdeucher@gmail.com --- (In reply to Nicolas Werner from comment #69)
I also have the same problem. (same notebook, so not surprising)
I tried everything you recommended (in comment #65), in order, nothing helps. Any more suggestions?
Does this patch help? http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1c...
Btw, I'm using OpenSUSE, so Kernel 3.16.6.
Also xrandr output is much shorter than the ones posted here, is that normal when you use modeset=0?
Yes. When you set modeset=0 you are effectively disabling the radeon driver so you end up with vesa or efifb or some other platform driver rather than the native driver.