iBook G4 hang at ADB mouse detection

[Bruce Cran]

I just upgraded to the very latest -CURRENT and my iBook now hangs at
boot:

...
pmu0: <Apple PMU99 Controller> mem 0x16000-0x17fff irq 25 on macio0
pmu0: [MPSAFE]
pmu0: [ITHREAD]
pmu0: PMU child <battery>
pmu0: PMU child <pmu-i2c>
pmu0: PMU child <rtc>
pmu0: PMU child <adb>
pmu0: PMU child <power-mgt>
adb0: <Apple Desktop Bus> on pmu0
akbd0: <iBook Keyboard> at device 2 on adb0
kbd: new array size 4
kbd1 at atkbd0
ams0: <ADB Mouse> at device 3 on adb0
<hangs>

Anything I can do to try and track down the problem?

-- 
Bruce Cran