Oh, no! First there are several years between those two version of Xorg and
secondly I believe the problem is thightly entangled with the
introduction/usage of the new proprietary radeon firmware. I would expect that
at the certain point in time where the radeon frimware was introduced to be
used by radeon that from there on it does not work. I would be ready to test it
if you can give me a git-commit# or tag from the last version without it and
the first one with it. This could infringe the testing problem enormously.