Sudden slow clock

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Every so often my Dell Inspiron 1200 laptop starts losing 10
seconds an hour, fixed by rebooting.

So I put in a script to compare the time with the time
from a website every ten minutes, giving yesterday

laptop 07:12:18 correct 07:12:13 error -5 sec
laptop 07:22:23 correct 07:22:18 error -5 sec
laptop 07:32:27 correct 07:32:22 error -5 sec
laptop 07:42:35 correct 07:42:29 error -6 sec
laptop 07:52:42 correct 07:52:37 error -5 sec
laptop 08:02:45 correct 08:02:40 error -5 sec
laptop 08:12:56 correct 08:12:50 error -6 sec
laptop 08:23:00 correct 08:22:55 error -5 sec
laptop 08:33:03 correct 08:32:59 error -4 sec
laptop 08:43:07 correct 08:43:02 error -5 sec
laptop 08:53:10 correct 08:53:05 error -5 sec
laptop 09:03:14 correct 09:03:09 error -5 sec
laptop 09:13:17 correct 09:13:12 error -5 sec
laptop 09:23:21 correct 09:23:16 error -5 sec
laptop 09:33:25 correct 09:33:20 error -5 sec
laptop 09:43:36 correct 09:43:31 error -5 sec
laptop 09:53:40 correct 09:53:35 error -5 sec
laptop 10:03:44 correct 10:03:39 error -5 sec
laptop 10:13:56 correct 10:13:50 error -6 sec
laptop 10:23:57 correct 10:23:56 error -1 sec
laptop 10:33:59 correct 10:34:00 error 1 sec
laptop 10:44:06 correct 10:44:08 error 2 sec
laptop 10:54:13 correct 10:54:14 error 1 sec
laptop 11:04:16 correct 11:04:21 error 5 sec
laptop 11:14:18 correct 11:14:25 error 7 sec
laptop 11:24:20 correct 11:24:29 error 9 sec
laptop 11:34:22 correct 11:34:32 error 10 sec
laptop 11:44:24 correct 11:44:36 error 12 sec
laptop 11:54:32 correct 11:54:43 error 11 sec
laptop 12:04:35 correct 12:04:49 error 14 sec
laptop 12:14:37 correct 12:14:53 error 16 sec
laptop 12:24:47 correct 12:25:04 error 17 sec
laptop 12:34:52 correct 12:35:11 error 19 sec
laptop 12:44:54 correct 12:45:15 error 21 sec
laptop 12:55:04 correct 12:55:24 error 20 sec
laptop 13:05:08 correct 13:05:31 error 23 sec
laptop 13:15:11 correct 13:15:35 error 24 sec
laptop 13:25:21 correct 13:25:45 error 24 sec
laptop 13:35:24 correct 13:35:51 error 27 sec
laptop 13:45:26 correct 13:45:55 error 29 sec
laptop 13:55:34 correct 13:56:03 error 29 sec
laptop 14:05:46 correct 14:06:16 error 30 sec
laptop 14:15:48 correct 14:16:22 error 34 sec
laptop 14:25:50 correct 14:26:26 error 36 sec
laptop 14:35:52 correct 14:36:29 error 37 sec
laptop 14:45:54 correct 14:46:33 error 39 sec
laptop 14:55:57 correct 14:56:37 error 40 sec
laptop 15:05:59 correct 15:06:40 error 41 sec
laptop 15:16:00 correct 15:16:44 error 44 sec
laptop 15:26:02 correct 15:26:47 error 45 sec

after many days of remaining around -4 seconds.

And, clue, the Date and Time Properties of the clock

The time has been successfully synchronized with
time-b.timefreq.bldrdoc.gov on 5/16/2008 at 10:16 AM.

which is when the clock started drifting.

Rebooting without changing the clock setting made it
come up again with the correct time, which it holds fine.

It's as if some clock correction factor had been screwed up
that isn't a permanent part of the clock record, and so is lost
when you restart.

Any ideas?
--
rhhardin@xxxxxxxxxxxxxx

On the internet, nobody knows you're a jerk.
.

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