Athlon64 + MSI = Problems with APIC

Steven Ringwald asric at
Mon Dec 12 23:07:19 UTC 2005

On Mon, 2005-12-12 at 17:47 -0500, Murphy, Patrick wrote:

> I had the same time drift issue.  I have an Athlon64 X2 chip and an
> MSI-7100.  It seems that the default system timer detection in newer
> kernels has changed.  After searching the net, I found that adding the
> option  clock=pmtmr to the /boot/grub/grub.conf for the kernel you are
> loading solves the problem (at least with my motherboard).  A code
> sample from my system is below:
> default=0
> timeout=10
> splashimage=(hd0,1)/grub/splash.xpm.gz
> hiddenmenu
> title Fedora Core (2.6.14-1.1644_FC4smp)
>   root (hd0,1)
>   kernel /vmlinuz-2.6.14-1.1644_FC4smp ro root=/dev/VolGroup00/LogVol00
> rhgb clock=pmtmr quiet
>   initrd /initrd-2.6.14-1.1644_FC4smp.img

Ok. Thanks for the suggestion. Have added it to the kernel line, and it
seems to have solved the problem (for now).

I noticed a difference between different kernel versions. 2.6.12-1.1381
(FC3) has the problem, but 2.6.14-1.1644 (FC4) does not. Not really in
the mood to upgrade my entire production server to FC4 just yet, so I
will be testing the clock line and seeing if that works for me.

Again, thanks!

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