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Bug#338467: marked as done (AMD64/ATI : timer is running twice as fast as it should)

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Received: (at submit) by bugs.debian.org; 10 Nov 2005 12:57:26 +0000
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From: "Richard L. Mace" <macer@ukzn.ac.za>
Organization: University of KwaZulu-Natal
To: submit@bugs.debian.org
Subject: AMD64/ATI : timer is running twice as fast as it should
Date: Thu, 10 Nov 2005 14:56:16 +0200
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Package: linux-image-2.6.12-1-amd64-k8
  Version: 2.6.12-1 (and I suspect also later kernels)

Hardware Environment: HP nx6125 (AMD Turion ML 34, ATI Radeon express 200M
chipset, onboard ATI X300)

Software Environment: Kernel 2.6.12-1-amd64-k8, Debian amd64 
(testing/unstable), WM = KDE  3.4.2.

Problem Description: clock/timer runs twice as fast as it should. This is 
kernel bug #3927. There is a patch available on bugzilla.kernel.org which 
works for the amd64 port (Matthew Garrett's patch, see  
http://bugzilla.kernel.org/attachment.cgi?id=6061&action=view). I have been 
using this patch for some time on vanilla kernel with success and I 
believe that it has been incorporated into the Ubuntu Breezy kernels (see 
discussion on bugzilla.ubuntu.com bug# 18164), but has not made it into the 
above Debian kernel. 

On the HP nx6125 this has the side effect of setting all thermal trip points 
to 16 degrees C, consequently the CPU frequency is scaled to 800MHz and the 
machine runs glacially slowly.

Temporary workaround: boot with no_timer_check. (Booting with noapic on the HP 
nx6125 gives a kernel panic on boot.)

Richard Mace
School of Physics, University of KwaZulu-Natal, Howard College Campus
Durban 4041, South Africa
Tel.: +27 (0)31 260 1402	FAX: +27 (0)31 261 6550
Please find our disclaimer at http://www.ukzn.ac.za/disclaimer

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Date: Thu, 12 Jan 2006 14:55:26 +0100
From: Frederik Schueler <fs@debian.org>
To: 338467-done@bugs.debian.org
Subject: RE: AMD64/ATI : timer is running twice as fast as it should
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This is a hardware bug, and the kernel provides the disable_timer_pin_1
parameter as a workaround.

Closing the bug.

Best regards
Frederik Schueler


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