Im vorigen Post am Kopf gekratzt, an einen Artikel erinnert, angesurft. Phoronix weiß genaueres:
HAL is currently being used by the X Server for input device detection with hot-plugging support, mapping, and device option handling, but all of that is in the process of being gutted. Instead the X Server will revert to using platform-specific libraries and code for handling these responsibilities. To replace the device option handling that was previously done through HAL FDI files, the X Server is picking up support for reading configuration files from a directory rather than just the conventional /etc/X11/xorg.conf.
Solange die entsprechenden Patches noch nicht in Ubuntu eingeflossen sind (vermutlich passiert das erst in Lucid+1), müsste es auch ein entsprechender Eintrag in /etc/gdm/Init/Default tun.