On up to date Lucid as of 2010-03-09, this is still a problem with no xorg.conf file (X defaults to XAA).
$ cat /proc/version_signature Ubuntu 2.6.32-16.24-generic
On up to date Lucid as of 2010-03-09, this is still a problem with no xorg.conf file (X defaults to XAA).
$ cat /proc/version_ signature 16.24-generic
Ubuntu 2.6.32-