Re: [CentOS] Clock Drifts Off

Jim Perrin wrote:

On 2/2/07, Matt lm7812@gmail.com wrote:

...

I installed CentOS 4.4 32 bit on a dual core AMD64 motherboad. Its a Tyan Tomcat K8E motherboard with socket 939. The clock keeps drifting off like 5+ minutes an hour. Run ntpupdate hourly to compensate.

Any ideas why or how to fix?

Probably a buggy/unsupported apci setup. Look for a bios update, or use the kernel options 'clock=pmtmr' or 'clock=pit'

Yup, I've had similar problems with some Tyan Opteron systems (even with current bios). In /boot/grub/grub.conf add a kernel parameter like so:

title CentOS (2.6.9-42.0.8.EL) root (hd0,0) kernel /vmlinuz-2.6.9-42.0.8.EL ro root=LABEL=/ clock=pmtmr initrd /initrd-2.6.9-42.0.8.EL.img

Cheers,