[mythtv-users] OT: System clock running very slow

Nick Rout nick.rout at gmail.com
Mon Jan 18 21:44:59 UTC 2010


On Tue, Jan 19, 2010 at 10:03 AM, Ian Newby <ian at codex.org.uk> wrote:
> Hi Folks,
> My combined frontend/backend mythtv box (running 0.21 on Ubuntu 8.04) has
> been working now for about 3 years with no problems (not caused by me).
>
> However, since Christmas, the system clock has become very inaccurate. Its
> now so inaccurate that ntpd cannot keep it up to date.
> My current estimate is that it is loosing about 4 hours in a 48 hour period,
> which makes recording very difficult. I've sidestepped the problem by
> disabling ntpd and running ntpdate very 15 minutes from cron.
>
> Anyone have any ideas as to what is causing the clock to slow so much. I may
> have done package updates which could have caused this. Anyone else having a
> similar problem?

possibly your ntp.drift file has garbage in it. Have a look and see
what the value is. In *buntu its /var/lib/ntp/ntp.drift. IIRC its safe
to clear the contents and restart ntpd.


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