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Re: Turion64 clock and the APIC

On Wed, Aug 17, 2005 at 11:06:06PM -0700, Alex Perry wrote:
> I've been using a Turion64 based laptop for a couple of weeks,
> installed with Sarge/Pure64 in a single boot configuration,
> and everything is as expected.  Just like my Athlon64 laptops.
> There's just one irritating thing.  Unless I specify NOAPIC,
> the system clock runs exactly twice as fast as wall clock.
> It maintains that ratio irrespective of the CPU frequency.
> It's true in both the Debian "kernel-image-2.6.8-11-amd64-k8"
> as well as the most recent stable release (local build).
> Has anyone come across a patch to fix the problem neatly so I
> can turn my the APIC again?  Just thought I'd ask on list ...
> 	Alex.
> PS:
> HP L2005: ML-34, ATI south & video, RTL8139, Broadcom, rest TI.

As far as I have been able to follow on lkml, this is a known problem on
ATI chipsets.  The cause has not yet been found it seems.  it could be a
bug in the hardware, or the kernel using the hardware slightly wrong.

You might want to go look for that thread on lkml archives.

Len Sorensen

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