On Wed, 6 Sep 2006 19:35:25 +0100 (BST)
David Brownlee <abs@absd.org> wrote:

>  	I have a selection of machines of varying BIOS revisions and
>  	CPUs. Cool`n'Quiet is enabled in the BIOS on all of them but
>  	some of them do not seem to detect it. So this is a mixed
>  	success report :)
> 
>  	They are all running one of two kernels - custom ACPI or
> custom ACPI_MP.
> 
>  	Obviously I can mess with BIOS versions, but there are issues
>  	with certain BIOS revs and 4GB of memory I'd rather not
> experience right now, but is there anything else obvious I could do
> to help get more data on this?

You could try enabling POWERNOW_DEBUG, but perhaps those CPUs
do not have pst tables in BIOS and the only method to get them is
via ACPI (which currently we do not support).