Clock drift on an iBook2
eblanton at cs.ohiou.edu
Wed Jul 18 03:04:25 EST 2001
Benjamin Herrenschmidt spake unto us the following wisdom:
> >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.
> Are you using MOL or do you experience this with nothing special running ?
Nothing special... I tried using ntpd to fix the problem, but it
didn't seem to be able to set the system time and I'm not sure why.
> Do you have the same issue if you disable powersave_nap (/proc/sys/
> kernel/powersave_nap) ?
Yes, it seems to make no difference. (~4s of drift in 3 minutes
either way, according to the tests I just did)
> 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
Looking into your next email regarding the VIA...
If I've told you once, I've told you once
And once is all that you needed.
-- The Refreshments, "Carefree"
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