Interface freezes MacFixIt reader Chris Gauch reports an issue, noted in an Apple Discussions thread, where Mac OS X's GUI becomes largely unresponsive:
"I work with G5s on a daily basis, dual 1.8s, 2.0s, etc., all running ATi Radeon 9600 or 9800 GPUs. All of these G5s occasionally freeze (the user interface is no longer usable, yet the mouse pointer can move freely and the system is still accessible via SSH on the network, and can be rebooted that way). Many of the G5 systems FIRST exhibited the UI freeze during the software update process, after a fresh, clean install of Panther (10.3.2), as I always partition out the larger drives and therefore reinstall the Mac OS from the software restore CDs.
"I spoke with an upper-level tech at Apple the other night and he did confirm that Apple was aware of the issue and that it was software related, specifically to the OS. That was the most detailed info I could get from the Apple tech. According to others in that Apple Discussions thread (above), the window manager appears to be the main culprit, although it is hard to confirm due to the intermittent nature of the UI freezing (some go for weeks without freezing, others go for just minutes or hours -- mine are completely random)."