Re: can't boot 2.6.17-rc1

[Michael Schmitz <schmitz@zirkon.biophys.uni-duesseldorf.de>]

> > From my quick tests here (I'm travelling, so no much time), it looks
> > like it's dying on the first msleep() (either radeonfb or whatever else
> > if you play with driver order), which makes me strongly suspect the idle
> > loop changes. I'll try to fix that when I'm back next week unless paulus
> > beats me to it.
>
> This patch fixes it for me on my powerbook (1.5GHz albook).  The issue
> seems to be that the cpu objects to HID0_NAP being cleared in HID0.
> If I have this code power_save_6xx_restore, it hangs:
>
> _GLOBAL(power_save_6xx_restore)
> 	mfspr	r11,SPRN_HID0
> 	rlwinm	r11,r11,0,10,8		/* Clear NAP */
> 	mtspr	SPRN_HID0,r11
> 	b	transfer_to_handler_cont
>
> If I take out that rlwinm, it boots.  Bizaare.

Even more bizarre: if I get the old arch/ppc default_idle() from the
attic, and call that in cpu_idle() instead of ppc_md.power_save(), it just
works.

default_idle() just calls ppc_md.power_save(), that's the bizarre thing.

Timing problem, perhaps?

	Michael