That's pretty messed up, I just verified that the two ATI pci ids in your Xorg.log are indeed properly configured in discover-data...
(II) PCI: 01:00:0: chip 1002,4144 card 1458,4016 rev 00 class 03,00,00 hdr 80 (II) PCI: 01:00:1: chip 1002,4164 card 1458,4017 rev 00 class 03,80,00 hdr 00 -- vesa driver used instead of radeon for R300 https://launchpad.net/bugs/90175 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
