Date: Wed, 2 May 2007 14:09:12 +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: <20070502140536.K860@thinkpad.dieringer.dyndns.org> In-Reply-To: <20070502132901.L860@thinkpad.dieringer.dyndns.org> References: <Pine.BSF.3.96.1070502190217.7307B-100000@gaia.nimnet.asn.au> <20070502132901.L860@thinkpad.dieringer.dyndns.org>
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On Wed, 2 May 2007, Martin Dieringer wrote: > 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. Might this have to do with it? Now I got following while playing sound on the Compaq: kernel: calcru: runtime went backwards from 183711700 usec to 183167434 usec for pid 12 (swi4: clock sio) here I have a working clock, but also intermittent sound output m.
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