On Sat, 2005-01-22 at 18:23 +0100, Mikael Pettersson wrote:

Kernels 2.6.11-rc2 and -rc1 hang during boot on my Beige PowerMac G3.
The last kernel message on the console is:

adb: starting probe task...

At this point the kernel hangs and doesn't respond to any attempt
to invoke SYSRQ or XMON. Normally the subsequent messages would be:

adb devices: [2]: 2 5 [3]: 3 1
ADB keyboard at 2, handler set to 3
Detected ADB keyboard, type ISO, swapping keys.
input: ADB keyboard on adb2:2.05/input
ADB HID on ID 3 not yet registered
ADB mouse at 3, handler set to 2
input: ADB mouse on adb3:3.01/input
adb: finished probe task...

The 2.6.11-rc1 kernel also hung on an eMac (G4). On that machine it
appears the hang occurred in radeonfb: the screen flickers off/on
during radeonfb initialisation, but with 2.6.11-rc1 the screen just
went black. Afterwards the eMac did not respond to any keyboard or
network activity, so I have to assume it hung hard.

I've traced the cause of the hangs to a local_irq_disable() added to
init/main.c:rest_init() in 2.6.10-bk12. Removing it eliminates the
hangs on both the G3 and the eMac:

I know about this problem, I'm working on a proper fix. Thanks for your
report.

Ben.