Date: Wed, 15 Oct 2008 10:21:43 -0600
From: Jordan Crouse <jordan.crouse@amd.com>
To: Antipov Dmitry <dmantipov@yandex.ru>
CC: linux-kernel@vger.kernel.org
Subject: Re: 2.6.27: 0 MHz CPU and wrong system time on AMD Geode system
Message-ID: <20081015162143.GA19397@cosmic.amd.com>
References: <414861224052797@webmail58.yandex.ru>
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On 15/10/08 10:39 +0400, Antipov Dmitry wrote:
> After updating the kernel to 2.6.27 from 2.6.25.4, my system time goes wrong and
> CPU becomes 0 MHz (as shown by /proc/cpuinfo), probably due to these issues:
> 
> TSC: Unable to calibrate against PIT
> TSC: No reference (HPET/PMTIMER) available
> Marking TSC unstable due to could not calculate TSC khz
> 
> The hardware is http://www.fit-pc.com/new/fit-pc-1-0-specifications.html,
> and the base system is Fedora 9.
> 
> More details: 2.6.25.4 .config: http://78.153.153.8/tmp/config-2.6.25.4.txt
>               2.6.25.4 boot messages: http://78.153.153.8/tmp/boot-2.6.25.4.txt
>               2.6.27 .config: http://78.153.153.8/tmp/config-2.6.27.txt
>               2.6.27 boot messages: http://78.153.153.8/tmp/boot-2.6.27.txt

Hmmm - this is an interesting regression.  Please remove
CONFIG_GEODE_MFGPT_TIMER=y from your 2.6.27 kernel and see if the
problem goes away.  I have been running 2.6.26.5 on my system with no
problems, but I'm embarrassed to admit that I haven't run anything
newer in a while.  

Jordan
-- 
Jordan Crouse
Systems Software Development Engineer 
Advanced Micro Devices, Inc.

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