I've just tried again with my HD3650 and only 2GB of RAM installed. I pointed authatieventsd.sh to /var/run/xauth/ and rebooted, but when I logout of KDE it still locks up so completely that even raising elephants with the magic sysreq key doesn't help. This was still with fglrx 8.3 btw.
No announcement yet.
New ATI drivers - black screen, system freeze and crash. Anyone in the same boat?