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?
Matt
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'
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,
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'
Even microsoft offers linux solutions: http://support.microsoft.com/kb/918461
-eric wood
Even microsoft offers linux solutions: http://support.microsoft.com/kb/918461
That seems to have fixed it. Thanks.
Matt
Matt 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?
dunno why, but ntpd may be able to correct it.
# yum install ntpd # vi /etc/ntp.conf # chkconfig ntpd on # service ntpd start
all the conf file -needs- is a server line or two referencing some local-to-you NTP servers. check with your ISP to see if they have any if you're not already running your own.
On Sat, 2007-02-03 at 09:44 -0800, John R Pierce wrote:
Matt 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?
dunno why, but ntpd may be able to correct it.
<snip ntpd sugestion>
ISTR that several postings to the list have touched on this. I don't have the problem, so I am unsure of the replies. I do seem to recall that various types of clock settings can be passed on the kernel line in the grub menu file. One parameter of "pmtr" (?) sticks in my mind. And there are others. I think a search of the list archives may yield your best answer.
Although, ntpd is *still* a good idea. I run it just to take care of those niggling little seconds of drift that all typical PC hardware clocks can/will experience over time.
HTH -- Bill
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