https://bugzilla.kernel.org/show_bug.cgi?id=60791
--- Comment #24 from Alex Deucher alexdeucher@gmail.com --- (In reply to Hamsi2k from comment #23)
Sadly it doesn't fix the issue on my setup. I applied it on the 3.11.0 release without previous patches.
Can you attach a copy of your vbios and dump the broken and working registers as per comment 13?