Date: Wed, 2 May 2007 13:30:44 +0200 (CEST) From: Martin Dieringer <martin.dieringer@gmx.de> To: Ian Smith <smithi@nimnet.asn.au> Cc: Clayton Milos <clay@milos.co.za>, freebsd-stable@freebsd.org, Jeremy Chadwick <koitsu@freebsd.org> Subject: Re: clock too slow - big time offset with ntpdate Message-ID: <20070502132901.L860@thinkpad.dieringer.dyndns.org> In-Reply-To: <Pine.BSF.3.96.1070502190217.7307B-100000@gaia.nimnet.asn.au> References: <Pine.BSF.3.96.1070502190217.7307B-100000@gaia.nimnet.asn.au>
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On Wed, 2 May 2007, Ian Smith wrote: > On Wed, 2 May 2007, Martin Dieringer wrote: > > 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... > > I'm wondering if this might have to do with power_profile's settings of > hw.acpi.cpu.cx_lowest when moving from AC to battery power? I don't have these values, are they ACPI? I switched off ACPI on both machines, but I use APM. m.
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