CPU Freq for 1.66 Ghz PowerBooks

[Bill Fink]

Hi Jonathan,

On Thu Mar 24 2005, Jonathan Hartje wrote:

>     I have one of the new 1.66 GHz PowerBooks with YDL 4.0.1 installed. 
> It seems as though cpufreq isn't happy with the new chip speed. Does 
> anyone know how/where to insert new information to get the clock speed 
> up to normal. I figure a newer kernel release is probably upcoming from 
> TSS, so I can wait if need be. Just wondering.

You will need a new kernel.  Consult the thread on linuxppc-dev at:

	http://ozlabs.org/pipermail/linuxppc-dev/2005-March/018580.html

It includes a kernel patch you could try out (requires a 2.6.11 kernel).

There is also another thread dealing with sleeping and cpufreq issues at:

	http://ozlabs.org/pipermail/linuxppc-dev/2005-March/018655.html

Or you could just wait as you suggested for TSS to release a new kernel.

						-Bill



linuxppc-dev message from Benjamin Herrenschmidt:
--------------------------------------------------------------------------------

Subject: Newer laptops & CPU speed

From: Benjamin Herrenschmidt
Date: Mon Mar 14 13:33:42 EST 2005

Hi !

It seems the new laptops are booting with CPU set to low
speed. /proc/cpuinfo outputs the wrong fequency (thinks it's high speed)
but bogomips shows that it's running at about half speed. This patch
against 2.6.11 (will not apply on 2.6.10) adds proper cpufreq support so
that the boot speed is recognized (fixing /proc/cpuinfo output) and so
you can acutally use cpufreq interface & utilities to switch to full
speed (I recommend powernowd).

This is completely untested as I don't have access to any of those new
models yet, so I'm waiting for some feedback before submitting upstream.

Ben.

[patch deleted]