Difference on the Xorg.log between a failed DRI launch when sis_agp is in charge and a working DRI launch when amd64_agp is in charge.
** Attachment added: "output from 'diff Xorg-failed-DRI Xorg-working-DRI > Xorg-diff'" http://librarian.launchpad.net/5911163/Xorg-diff -- Kernel loads two AGP bridges - causes Radeon DRI to fail https://launchpad.net/bugs/81950 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
