[Voyage-linux] Clock Drift

[Robert]

Hello Guys,

I hope you're all well. I've been trying to resolve the clock drift issues again today and I'm struggling.

I cannot use the 'nomfgpt' work around as we rely on the watchdog and doing so breaks it.

I have installed adjtimex and ntp:

apt-get install adjtimex
apt-get install ntp

Which I thought may solve the issue as some others have suggested but even with this the clock still drifts wildly, and after just a couple of hours the clock is already several minutes out of sync.

Can anyone offer any other advice? I could always schedule a cron task to correct the clock but that seems so hacky.

Thanks,

Robert

On 11/06/2010 03:28, "Darryl Ross" <spam at afoyi.com> wrote:

Really old thread, but wanted to say thanks, this has fixed the same
problem I was having on 2x Alix2-3 systems.



Robert wrote:
> Hi Jordi,
>
>
>
> That's a great help, thank you! I'll give that a go and see how I get on :-D
>
>
>
> Your wFrog sounds like an interesting project, do you do much work with
> Thermometers and Hygrometer hardware? If so I've got a little pet
> project on the go which I'd be interested to talk with you about! :-D
>
>
>
> Rob
>
>
>
> *From:* Jordi Puigsegur [mailto:jordi.puigsegur at gmail.com]
> *Sent:* 26 February 2010 10:26
> *To:* Robert
> *Cc:* voyage-linux at list.voyage.hk
> *Subject:* Re: [Voyage-linux] Clock Drift
>
>
>
> I run into the same problems a couple of weeks ago. First I tried
> disabling mfgpt and it solved the problem but left the watchdog driver
> not funcional. Later on I undid this change, activated again mfgpt and
> installed adjtimex and ntp. My system is now working in perfect sync.
>
> I've described this configuration in a wiki
> (http://code.google.com/p/wfrog/wiki/InstallOn_Alix3D2_voyageLinux0_6_2#Clock_sync).
> wfrog is the open source weather logger I'm running on the Alix 3D2.
>
> Hope it helps!
>
> Jordi.
>
> 2010/2/26 Robert <Robert at supporttime.com <mailto:Robert at supporttime.com>>
>
> Hey Punky,
>
> Thanks for getting back to me. So you're saying I have a choice between
> a working clock or a working watchdog, I can't have both?
>
> Robert
>
>
> -----Original Message-----
> From: Punky Tse [mailto:punkytse at punknix.com <mailto:punkytse at punknix.com>]
> Sent: 26 February 2010 02:48
> To: Robert
> Cc: 'voyage-linux at list.voyage.hk <mailto:voyage-linux at list.voyage.hk>'
> Subject: Re: [Voyage-linux] Clock Drift
>
> Hi Robert,
>
> Disabling mfgpt will make geode watchdog driver no functional.
> [   22.373287] geodewdt:  No timers were available
>
> Regards,
> Punky
>
> Robert wrote:
>> Hi Punky, Thierry,
>>
>> Thanks very much for that suggestion. Tell me, is there any downside
> to adding that boot parameter? is it likely to cause me other issues?
>>
>> Many thanks,
>>
>> Rob
>> ________________________________________
>> From: voyage-linux-bounces+robert=supporttime.com
> <http://supporttime.com>@list.voyage.hk <http://list.voyage.hk>
> [voyage-linux-bounces+robert=supporttime.com
> <http://supporttime.com>@list.voyage.hk <http://list.voyage.hk>] On
> Behalf Of Thierry MUSEUX - www.fwt.fr <http://www.fwt.fr> - [tm at fwt.fr
> <mailto:tm at fwt.fr>]
>> Sent: 25 February 2010 16:58
>> To: 'voyage-linux at list.voyage.hk <mailto:voyage-linux at list.voyage.hk>'
>> Subject: RE: [Voyage-linux] Clock Drift
>>
>> Hi,
>>
>> I have put in /boot/grub/menu.lst
>> kernel /vmlinuz root=LABEL=ROOT_FS  console=ttyS0,38400n8 nomfgpt
>>
>> and in /etc/crontab
>> 15 * * * * root /usr/sbin/ntpdate 0.fr.pool.ntp.org
> <http://0.fr.pool.ntp.org> >> /dev/null 2>&1
>>
>> This solve the issue.
>>
>>
>> Thierry Museux
>> France Wireless Technologies
>> www.fwt.fr <http://www.fwt.fr>
>> msn: tm at fwt.fr <mailto:tm at fwt.fr>
>> Tel: + 33 (0) 1 41 08 70 78
>> Gsm: + 33 (0) 6 15 22 09 62
>>
>>
>>
>>
>> -----Message d'origine-----
>> De : voyage-linux-bounces+tm=fwt.fr <http://fwt.fr>@list.voyage.hk
> <http://list.voyage.hk>
>> [mailto:voyage-linux-bounces+tm
> <mailto:voyage-linux-bounces%2Btm>=fwt.fr <http://fwt.fr>@list.voyage.hk
> <http://list.voyage.hk>] De la part de Roel
>> Huybrechts
>> Envoyé : jeudi 25 février 2010 17:40
>> À : Robert
>> Cc : voyage-linux at list.voyage.hk <mailto:voyage-linux at list.voyage.hk>
>> Objet : Re: [Voyage-linux] Clock Drift
>>
>> Hi Rob,
>>
>> Op donderdag 25-02-2010 om 08:26 uur [tijdzone -0800], schreef Robert:
>>
>>> Hello Guys,
>>>
>>> I've got some pretty serious clock drift on all the ALIX 3d2 which we've
>>>
>> got. Seems that after even just a short period of running the time on the
>> systems is quite out of sync with the real time.
>>
>>> Is this a common issue? We've had it for a long time but I've only
>>>
>> recently sat down and tried to find a solution to the problem. Is this
>> hardware related? or something software related?
>>
>>> Appreciate any advice you can offer.
>>>
>>> Rob
>>>
>>
>> I've experienced the same issue on the ALIX 2d2 boards here. I've been
>> able to greatly reduce the drift by installing the adjtimex package.
>>
>> Hope this helps for you as well.
>>
>> Regards
>>
>> --
>> Roel Huybrechts
>>
>> GPG  | 4096R/5E2DE374
>>      | http://rulus.be/gpg
>>
>>
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>>
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>>
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>>
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>>
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>
>
> Support Time Managed Services - monitoring and development for entire
> business technology
>
> Tel: 0800 999 4333
> www.supporttime.com <http://www.supporttime.com>
>
> Support Time Limited
> 1000 Lakeside North Harbour
> Portsmouth PO6 3EZ United Kingdom
>
> _______________________________________________
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>
>
>
> ------------------------------------------------------------------------
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> business technology
>
> Tel: 0800 999 4333
> www.supporttime.com
>
> Support Time Limited
> 1000 Lakeside North Harbour
> Portsmouth PO6 3EZ United Kingdom
>
>
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