Bug#649002: after upgrading to latest version, iBook touchpad stopped working

[greened@obbligato.org (David A. Greene)]

I also see this on a PowerBook G4.

processor       : 0
cpu             : 7447A, altivec supported
clock           : 1666.666000MHz
revision        : 1.2 (pvr 8003 0102)
bogomips        : 73.72
timebase        : 18432000
platform        : PowerMac
model           : PowerBook5,6
machine         : PowerBook5,6
motherboard     : PowerBook5,6 MacRISC3 Power Macintosh 
detected as     : 287 (PowerBook G4 15")
pmac flags      : 0000001b
L2 cache        : 512K unified
pmac-generation : NewWorld
Memory          : 1536 MB

It worked with the initial squeeze install and stopped working upon
upgrading to wheezy.