On Tue, Dec 14, 2004 at 12:03:29PM -0500, Michael wrote:
> Hello,
> 
> > >I only see the 7455s differ in flag - pfCanNap vs. pfWillNap vs nothing,
> > >the 7400 and the G3 has pfCanDoze and pfCanNap. So it's clear why the 745x
> > >are excluded - no doze mode. But the 7455 v2.1 and the 7457 should be
> > >included for nap mode.
> > 
> > According to MPC7455 User's Manual, the bit defined as HID_DOZE  in
> > arch/powerpc/include/oea/hid.h is not DOZE mode for this family. It is
> > HIGH_BAT_ENABLE, for additional address space mapping. This gets turned off
> > on cpu_subr.c
> > 
> > /* Select NAP mode. */
> > hid0 &= ~(HID0_DOZE | HID0_NAP | HID0_SLEEP);
> > hid0 |= HID0_NAP | HID0_DPM;
> 
> I enabled powersave on the iBook ( a 7455 v3.3 so Darwin would use nap
> ) - no negative side-effects so far and the machine indeed seems to cool
> down. Slowly, but it does.

My "1st-generation" Powerbook G4 runs awfully hot.  The fan scarcely
ever comes on when I'm running NetBSD.  Will any of these power-saving
changes being discussed lower its temperature?

Dave

-- 
David Young             OJC Technologies
dyoung@ojctech.com      Urbana, IL * (217) 278-3933