On Tue, 24 Jun 2014 10:49:20 -0700 (PDT) Rich Shepard <[email protected]> wrote:
> The ethernet-connected hosts here have static IP addresses. The
> wireless access point serves dynamic IP addresses on a different
> subnet. Only two portables use the WAP and both have a time keeping
> issue: each machine gains time and can get days ahead.
>
> While many of us wish we could gain time so everything can be
> accomplished, for the computers it is not desired. One laptop, a
> Toshiba Satellite running Slackware-14.1 booted and thought it was
> Thursday, June 26th, and 5:17 pm when it was only an hour ago. I
> reset the date and time, ran 'hwclock -w' to set the hardware clock
> to the system time, and shut down. Realizing that the reason users
> cannot run alsamixer was not having their usernames in the audio
> group, I rebooted. The system gagged because the last time /dev/sda1
> was checked was Thursday the 26th and now it is Tuesday the 24th and
> it doesn't know how to deal with back to the past. That was fixed by
> running 'e2fsck -v -y' and waiting.
>
> So, now the kernel is happy, and I need to figure out why only the
> two portables that connect to the 'Net wirelessly through the WAP
> keep gaining time. I've set up one of the laptops to use na.pool ntp
> servers but it still keeps gaining time. My Web searches and thread
> on linuxquestions.org have produced no solution for the one laptop;
> just this morning I saw the second has the same problem and realized
> the common factor is wireless connectivity.
>
> Any ideas of why only the portables connecting via the WAP keep
> gaining time would be much appreciated. Also, any diagnostics or
> tests I can run to isolate the source of the problem would be good.
I really doubt that running over the wireless network has anything
to do with your problem. So...
First off, make sure you have ntpd running on your laptops. You
can use ntpdate(8) to set the time if you need to. ntpdate is
deprecated; 'ntpd -q' is the replacement.
If your laptop's hardware clock gains too much while the laptop is
off, then you might want to look into the adjtimex(8) program. It
will let you set up a correction factor that will keep the
hardware clock within reasonable limits. You'll have to leave
your laptop running for quite a while, the longer the better. The
man page for adjtimex(8) will tell you what you need to know.
Anyway, I hope this helps.
--Dale
--
Yet creeds mean very little, Coth answered the dark god, still speaking
almost gently. The optimist proclaims that we live in the best of all
possible worlds; and the pessimist fears this is true.
-- James Branch Cabell, "The Silver Stallion"
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