https://bugs.freedesktop.org/show_bug.cgi?id=106940
--- Comment #36 from Server Angels seany@seanyseansean.com --- To be clear - rc8 (without any other patches) resolves my black screen at boot time issue.
I did have a black screen when coming out of suspend issue, which is now resolved, but I didn't think this was driver related as it also happened in Windows on the same machine. There has been a AMD Windows driver update recently too, so maybe the issue was resolved on both?