https://bugzilla.kernel.org/show_bug.cgi?id=60741
--- Comment #5 from Eastern Heart zxd123314@hotmail.com --- (In reply to Alex Deucher from comment #4)
Might be a duplicate of bug 60674. Can you try the patch on that bug? If that doesn't help, can you bisect?
I cannot try now... And I cannot even boot, not incorrect display! I said, my boot paused when start the kernel radeon module. Sorry.