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SubjectRe: [x86_64] Exception when using powernowd.

Written by Andrew Morton <>
at Fri, 2 Sep 2005 17:24:37 -0700 :
Subject: Re: [x86_64] Exception when using powernowd.

akpm> Kyuma Ohta <> wrote:
akpm> >
akpm> > I'm using MSI K8T Neo2 (VIA K8T800 chipset) and Athlon64 3000+
akpm> > with linux x86_64 2.6.13 kernel and Debian/sid.
akpm> > When enable powernow-k8 (i.e. using powernowd,cpudyn) to
akpm> > saving power, some process is down by null protection and
akpm> > system is unstable.
akpm> > Then disabling powernow-k8,and reboot, system is very stable.
akpm> >
akpm> > I attach any log,please give me a advice.
akpm> Did earlier kernels work OK? Can you identify the most recent 2.6 kernel
akpm> which didn't have this bug?

Without powernow! feature, works fine.(I tested every -rc kernel
after 2.6.8 for x86_64).
With powernow! feature,works bad at least after 2.6.11-rc*.

I'm using xserver-xorg at debian,6.8.2-dfsg.1-5 happend OOPS
at any process using X any older kernel, but update X to 6.8.2-6,
any processes not/with using X got null exception and down
when enable powernow! feature :-(
What happened?

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