Comment 9 for bug 473114

Okay, I tried that xorg.conf, but unfortunately, it didn't change anything for the display with the xorg radeon driver (Ubuntu did boot correctly with it, however).

I went ahead and re-tried with the previous xorg.conf you wrote for me, knowing it would crash. I tried startx in the recovery kernel, but no Xorg logfile was created for the crash... I checked all of the Xorg logs in /var/log/ and the only logs for crashes are for the very first xorg.conf you posted (with the fglrx driver). Strange.

I've gone ahead and posted the latest successful Xorg.0.log, who knows, maybe it can help. (I did install fglrx again, since it's the best temporary solution.)