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From: "Richard L. Mace" <[EMAIL PROTECTED]>
Organization: University of KwaZulu-Natal
To: [EMAIL PROTECTED]
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 2.6.13.4 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
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Thu, 12 Jan 2006 14:55:26 +0100
Date: Thu, 12 Jan 2006 14:55:26 +0100
From: Frederik Schueler <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: RE: AMD64/ATI : timer is running twice as fast as it should
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Hallo,
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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