I experienced too disappearance of mouse pointer right after upgrade to 2.6.32-31 and reboot. My machine is an Acer TM2301 with i855gm graphics and 768 MB ram.
Downgrading to 2.6.32-30 resolved the issue. Regards, Lorenzo Masellis -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org