Re: clock skew

Frank v Waveren (fvw@var.cx)
Tue, 28 Dec 1999 02:03:03 +0100


I've got the same problem, currently I've got rdate run from rc.local.
I've got an abit lx6 mobo... Haven't heard any solutions so far.
have you tried giving the param init=/bin/date at lilo to check it's not
in your init scripts?

On Mon, Dec 27, 1999 at 09:45:29AM -0500, Joe wrote:
> Maybe I was not clear in my first email or maybe I am confused. The only time
> the clock gets skewed is when I reboot or shutdown and then have to restart.
> During normal daily operation the clock time is fine. It is only when
> I shutdown the system like I did last night, and then restart it this morning
> and it told me it was wed teh 29th of dec. I reset the clock and now it is
> running fine. What will clock -w do that will affect the reboot?
>
>
> > Setup a cron that periodicly issues a clock -w. (If you don't know how,
> > ask and I will help).
> >
> > The problem is that your internal clock can't keep time right (which is
> > why it drifts when it's off). While Linux (and NT) is running, it runs off
> > it's own internal clock, which is sane. Linux never updates the cmos
> > clock, but NT does.
> >
> > This is not a bug in Linux, it's just a difference in design decision.
> >
> > On Sun, 26 Dec 1999, Joe wrote:
> >
> > > Hi,
> > > I am recently having a problem with my clock and date functions
> > > skewing time. I know that my BIOS is okay because I have tested the
> > > system under NT and al works fine. It only happens under Linux and it
> > > is always during the boot sequence.
> > >
> > > If I use either the clock or the date function to set the time the
> > > system runs fine, however due to certain circumstances I have to reboot
> > > the system occasiionally. When the system sets the system clock, the
> > > time is off and skewed forward. It is usually skewed forward about 30
> > > minutes to 40 minutes and this is after I issue a reboot command. If
> > > I turn off my computer and leave it off for a few hours or days the
> > > system clock is then skewed forward several days. This morning when
> > > I started my Linux box it was skewed forward to the 30th of Dec 1999.
> > > I reset the clock and then rebooted and when the system came back it was
> > > again ahead in time but this time only 30 minutes or so.
> > > I tried the same test and booting into Win NT and after setting the
> > > time once I was able to reboot to NT and not have any problems with my
> > > system time.
> > > Because I have recently just moved and am not completely set up I
> > > must shut down my system occasionally.
> > > The only thing that has changed is that I have recently started
> > > using kernel 2.2.13. The system runs RH 6.0 and the clock gets set in
> > > /etc/rc.d/rc.sysinit script. When it boots and shows me the time it is
> > > always faster than it should.
> > > Also there was one point that the date function was returning one
> > > time and the clock function was returning another time. Although this
> > > is probably not a kernel bug, I am wondering if anyone here can help me
> > > figure this out?
> > >
> > > thanks..Joe
> > >
> > > --
> > > Joe Acosta ........
> > > home: joeja@mindspring.com
> > >
> > >
> > >
> > >
> > > -
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> > >
>
> --
> Joe Acosta ........
> home: joeja@mindspring.com
>
>
>
>
> -
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-- 

Frank v Waveren fvw@var.cx ICQ# 10074100

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