linux-kernel - Re: cpuinfo shows wrong MHz value

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Message-Id: <200902182205.47737.elendil@planet.nl>
Date:	Wed, 18 Feb 2009 22:05:46 +0100
From:	Frans Pop <elendil@...net.nl>
To:	jplatte@...sa.net
Cc:	Kasper Sandberg <lkml@...anurb.dk>, linux-kernel@...r.kernel.org,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: cpuinfo shows wrong MHz value

On Wednesday 18 February 2009, Joerg Platte wrote:
> The last kernel that was working correct was 2.6.24 (here the output
> from 2.6.24.6):

Right. I suspect then that the following commit may be the cause of the
regression:
commit ed9cbcd40004904dbe61ccc16d6106a7de38c998
Author: Zhao Yakui <yakui.zhao@...el.com>
Date:   Tue Nov 20 14:20:21 2007 -0500
    Revert "speedstep-lib.c: fix frequency multiplier for Pentium4 models 0&1"

That would exactly explain the factor 8 of the error.

Do you have a line like the following in your debug output?
    P4 - FSB %u kHz; Multiplier %u; Speed %u kHz\n
If so, what does it say for .24 and .28?

Can you please provide the output of 'x86info -a' (as root) after loading
the cpuid module?
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