From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Ethan Blanton <eblanton@cs.ohiou.edu>, <linuxppc-dev@lists.linuxppc.org>
Subject: Re: Clock drift on an iBook2
Date: Tue, 17 Jul 2001 18:50:32 +0200 [thread overview]
Message-ID: <20010717165032.5490@smtp.adsl.oleane.com> (raw)
In-Reply-To: <20010717102730.B22214@localhost.localdomain>
>I have a new iBook2 and I'm having *severe* clock drift problems -- on
>the order of several seconds gained per minute. I'd like to get this
>taken care of, and it seems to be a linux problem as OSX appears to
>have a stable clock.
>
>I'm running BenH's 2.4.7-pre6 right now, but I also saw it on 2.4.6.
>
>Is this a known problem? If not, what can I do to help get this fixed?
>Ethan
Are you using MOL or do you experience this with nothing special running ?
Do you have the same issue if you disable powersave_nap (/proc/sys/
kernel/powersave_nap) ?
The TB is calibrated using the VIA, if we don't have a correct VIA frequency
or if the calibration routine is slightly off, that may also explain the
problem.
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2001-07-17 16:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-17 14:27 Clock drift on an iBook2 Ethan Blanton
2001-07-17 16:50 ` Benjamin Herrenschmidt [this message]
2001-07-17 16:52 ` Benjamin Herrenschmidt
2001-07-17 17:32 ` Ethan Blanton
2001-07-17 17:04 ` Ethan Blanton
2001-07-17 17:14 ` Tom Rini
2001-07-17 17:16 ` Ethan Blanton
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