I've been having various trouble with my iBook lately, including random
freezes, not waking up after going to sleep sometimes, and sometimes not
going to sleep. Since applying the patch you posted, everything seems
fine, though I may be speaking too soon.

My /proc/cpuinfo for reference:
 processor	: 0
 cpu		: 750FX
 temperature 	: 0-3 C (uncalibrated)
 clock		: 400MHz
 revision	: 2.3 (pvr 7000 0203)
 bogomips	: 793.71
 machine		: PowerBook4,3
 motherboard	: PowerBook4,3 MacRISC2 MacRISC Power Macintosh
 detected as	: 257 (iBook 2 rev. 2)
 pmac flags	: 0000001b
 L2 cache	: 512K unified
 memory		: 256MB
 pmac-generation	: NewWorld

Note that the maximum CPU speed is 900 MHz.

Can you also check my other patch which fixes cpufreq as well ? And test
if it's reliable wether you sleep at low or high speed ?

Thanks,
Ben.