[K12OSN] Re: time stopped

Michael C Wescott wescott at sc.rr.com
Wed Feb 16 23:54:55 UTC 2005

On Tue, 2005-02-15 at 20:35, Lee Harr wrote:
> >>Feb 14 16:20:22 loftern kernel: Losing too many ticks!
> >>Feb 14 16:20:22 loftern kernel: TSC cannot be used as a timesource.
> >The usual culprit in this kind of problem is something that keeps the
> >CPU occupied for long periods of time, keeping it from servicing timer
> >interrupts. As the messages suggest, Speedstep, HD not using DMA, or
> >improper SMP setup are possible causes.
> >
> >Other possible causes are hardware problems (i.e. stuck interrupt on
> >some PCI card). Anything else seem broken on the machine? Any recent
> >configuration changes? Have you tried rebooting to see if that clears it
> >up?
> >
> I rebooted a couple of times with no change.
> I shut off the power and booted up again, and now time
> is moving normally again.

That means it's likely a hardware glitch flooding the machine with
interrupts. Are there any cards in the machine you're not using or with
dangling cables? Sometimes a cable that goew nowhere can act like an
antenna and dump electrical noise into the system.

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