Comment 21 for bug 814250

As others have mentioned, this bug was fixed in Natty, but appears to not be fixed in Oneiric Beta 1:

[ 432.707858] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[ 432.712562] input: Apple Wireless Trackpad as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4/1-1.4:1.0/bluetooth/hci0/hci0:11/input16
[ 432.712728] magicmouse 0005:05AC:030E.0001: input,hidraw0: BLUETOOTH HID v1.60 Mouse [Apple Wireless Trackpad] on C4:17:FE:F0:EF:DF
[ 432.864186] magicmouse 0005:05AC:030E.0001: unable to request touch data (-5)
[ 433.275623] magicmouse: probe of 0005:05AC:030E.0001 failed with error -5

$ uname -a
Linux bigthink64 3.0.0-9-generic #15-Ubuntu SMP Tue Aug 30 14:57:16 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux