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Date: Wed, 2 May 2007 04:04:03 +0200 (CEST)
From: Martin Dieringer <martin.dieringer@gmx.de>
To: Clayton Milos <clay@milos.co.za>
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Cc: freebsd-stable@freebsd.org
Subject: Re: clock too slow - big time offset with ntpdate
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On Tue, 1 May 2007, Martin Dieringer wrote:

> On Tue, 1 May 2007, Clayton Milos wrote:
>
>>> Hi,
>>> 
>>> I get about half a second time offsets after 10 seconds, and more
>>> than 100s after half an hour or so.
>>> I think it has to do with powerd, if I kill that, the time stays correct.
>>> It happens both on a Compaq nc4000 and an IBM ThinkPad T42p laptop.
>>> 
>>> Can this be solved?
>>> thanks
>>> m.
>> 
>> This has got to do with the speed stepping of the CPU to save battery.
>> Far as I know there's no fix yet.
>> 
>> Guys is it possible to hack powerd to change a sysctl variable when it 
>> changes the CPU frequency or isn't it that simple?
>
>
> Another effect of the problem seems to be the intermittent sound
> output. Playback is ok when powerd is killed.
> When changing freq by sysctl, I still get hickups in sound, so this
> would be no solution.

the hiccups have reappeared, so they are not related to powerd.

I still have 0.5 seconds time offsets after 10 minutes, on the
thinkpad, without powerd...

m.