https://bugs.freedesktop.org/show_bug.cgi?id=56561
--- Comment #8 from dmotd inaudible@simplesuperlativ.es --- (In reply to comment #6)
Do newer kernels work without radeon driver options on the kernel command line, in particular without radeon.msi=0?
If not, can you bisect which kernel change introduced the problem?
The kernel command line options do not effect the later kernels.
I will need some spare time to bisect, although this bug report looks to be relevant, -- https://bugzilla.redhat.com/show_bug.cgi?id=845745 -- user 'Richard Gration' is running the exact same laptop setup as here and experiencing identical issues.