https://bugs.freedesktop.org/show_bug.cgi?id=60879
--- Comment #135 from Vedran Miletić rivanvx@gmail.com --- (In reply to madmalkav from comment #133)
I've set up a bounty for fixing this bug. Quantity is quite low, sorry. If anyone else affected by this bug can throw some bucks into this, I think it can help to get a solution sooner.
https://www.bountysource.com/issues/5643054-radeonsi-x11-can-t-start-with- acceleration-enabled
I have upped it to $100. I know this is very low amount of money for the amount of skill required to fix something like this, but I still hope that it will motivate someone.