Clock Problems

Richard Melville richard.melville69 at googlemail.com
Fri Dec 11 03:27:31 PST 2009


>
>
> On Friday 11 December 2009 12:49:52 Johnneylee Rollins wrote:
> > > I am use to old hardware (i486DX) having problems keeping time on the
> > > hardware clock. But isn't the system clock a separate thing? I am
> losing
> > > about 4 min on the system clock for every 10 minutes of real time. I've
> > > googled around for clock drift information. What I found suggests  that
> > > a system under heavy load with the 2.6.x kernel on certain hardware
> > > might show this symptom. I've yet to try it, but I've read that adding
> > > "clock=pit noapic nolapic" to the boot parameters should fix it.
> > >
> > > Is this something that will affect an LFS build? I don't like the idea
> > > of finding out towards the end that it will. That is my main concern.
> > > Should I ignore the clock issue? Is this something I should concern
> > > myself about? Any advice would be welcome.
> > >
> > > Thanks in Advance,
> > > Mykal Funk
> >
> >  I'm not sure about a permanent fix, but a script to update the time with
> a
> > ntp server might help. I'm not sure of the best method for offline use
> > unless someone can absolve this issue with a more permanent solution.
> >
>
> You may use the hwclock command periodically (that is in cron job) to help
> keeping your system time accurate.
>


It's a very old motherboard; a dying cmos battery will affect the hardware
clock which in turn will affect the system clock.  You could try replacing
the battery (usually a "coin cell"); they're not very expensive.

Richard
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