I *really* *really* think this problem is hardware related. I got another IBM A31 with exactly the same card, which is not affected by the problem and works like a charm. I reject the bug for the hardware cause.
** Changed in: xserver-xorg-driver-ati (Ubuntu) Status: Unconfirmed => Rejected -- Display corrupted with red pixels, eventually freeze, IBM A31 https://launchpad.net/bugs/44611 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs