More findings: If I edit /etc/X11/xorg.conf and do Option "UseFBDev" "false" in the Device section for "ATI Technologies, Inc. Rage 128 RL/VR AGP" instead of setting the option to "true" the bug doesn't occur. I have also found some other reports on the net for this bug in various stages of the Xfree86 and X.org development of this driver. The same behavior is found also using the the "r128" driver directly instead of indirectly through the "ati" driver.
So the bug is clearily in the FBDev part of the driver Status now is that the driver do not display on the internal iMac CRT but I got picture through the external VGA output. However that has nothing todo with the SIGSEGV bug found, but I am not stuck at it anymore and I am not looking for support here... ;-) -- [R128] Dapper ppc install cd SIGSEGV initializing X on iMac https://launchpad.net/bugs/63072 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs