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Groups > linux.debian.user > #173685 > unrolled thread

Time quandry when dual boot with WinXP Pro

Started byRichard Owlett <rowlett@cloud85.net>
First post2016-10-21 15:20 +0200
Last post2016-10-29 18:20 +0200
Articles 6 on this page of 26 — 10 participants

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  Time quandry when dual boot with WinXP Pro Richard Owlett <rowlett@cloud85.net> - 2016-10-21 15:20 +0200
    Re: Time quandry when dual boot with WinXP Pro Darac Marjal <mailinglist@darac.org.uk> - 2016-10-21 15:30 +0200
      Re: Time quandry when dual boot with WinXP Pro Richard Owlett <rowlett@cloud85.net> - 2016-10-21 16:50 +0200
      Re: Time quandry when dual boot with WinXP Pro David Wright <deblis@lionunicorn.co.uk> - 2016-10-21 17:10 +0200
        Re: Time quandry when dual boot with WinXP Pro Joe <joe@jretrading.com> - 2016-10-21 19:50 +0200
          Re: Time quandry when dual boot with WinXP Pro David Wright <deblis@lionunicorn.co.uk> - 2016-10-22 17:10 +0200
            Re: Time quandry when dual boot with WinXP Pro Joe <joe@jretrading.com> - 2016-10-22 17:10 +0200
            Re: Time quandry when dual boot with WinXP Pro Joe <joe@jretrading.com> - 2016-10-22 17:50 +0200
              Re: Time quandry when dual boot with WinXP Pro David Wright <deblis@lionunicorn.co.uk> - 2016-10-23 04:50 +0200
    Re: Time quandry when dual boot with WinXP Pro <tomas@tuxteam.de> - 2016-10-21 15:40 +0200
      Re: Time quandry when dual boot with WinXP Pro Richard Owlett <rowlett@cloud85.net> - 2016-10-21 16:30 +0200
        Re: Time quandry when dual boot with WinXP Pro Doug <dmcgarrett@optonline.net> - 2016-10-21 18:50 +0200
          Re: Time quandry when dual boot with WinXP Pro Richard Owlett <rowlett@cloud85.net> - 2016-10-21 20:20 +0200
            Re: Time quandry when dual boot with WinXP Pro <tomas@tuxteam.de> - 2016-10-21 21:20 +0200
        Re: Time quandry when dual boot with WinXP Pro <tomas@tuxteam.de> - 2016-10-21 21:20 +0200
          Re: Time quandry when dual boot with WinXP Pro tomas@tuxteam.de - 2016-10-21 21:30 +0200
            Re: Time quandry when dual boot with WinXP Pro Richard Owlett <rowlett@cloud85.net> - 2016-10-21 22:20 +0200
              Re: Time quandry when dual boot with WinXP Pro <tomas@tuxteam.de> - 2016-10-21 22:40 +0200
    Re: Time quandry when dual boot with WinXP Pro Stefan Monnier <monnier@iro.umontreal.ca> - 2016-10-22 22:10 +0200
      Re: Time quandry when dual boot with WinXP Pro Richard Owlett <rowlett@cloud85.net> - 2016-10-22 22:20 +0200
        Re: Time quandry when dual boot with WinXP Pro Stefan Monnier <monnier@iro.umontreal.ca> - 2016-10-22 22:20 +0200
          [REPOST] Re: Time quandry when dual boot with WinXP Pro Richard Owlett <rowlett@cloud85.net> - 2016-10-25 14:20 +0200
          Side effects of specifying use of NTP on installation???? - was [Re:  Time quandry when dual boot with WinXP Pro] Richard Owlett <rowlett@cloud85.net> - 2016-10-25 14:20 +0200
    Re: Time quandry when dual boot with WinXP Pro Lisi Reisz <lisi.reisz@gmail.com> - 2016-10-29 16:50 +0200
      Re: Time quandry when dual boot with WinXP Pro Felix Miata <mrmazda@earthlink.net> - 2016-10-29 17:30 +0200
        Re: Time quandry when dual boot with WinXP Pro Lisi Reisz <lisi.reisz@gmail.com> - 2016-10-29 18:20 +0200

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#173746

FromStefan Monnier <monnier@iro.umontreal.ca>
Date2016-10-22 22:20 +0200
Message-ID<svaVP-87x-1@gated-at.bofh.it>
In reply to#173745
>>> 2. Debian 8.6 w MATE run from LIVE DVD _displays_ the correct time
>>> 3. Debian 8.6 w MATE installed from DVD 1 of 13 with aid of custom
>>> preseed.cfg
>>> _displays_ a time 5 hours earlier.
>> My guess: the Live DVD uses NTP so as not to depend on the hwclock
>> whereas your installs don't.
> As the saying goes, "that does not compute".  The machine in question has not
> been connected to the internet, or any other network, for several years ;/

Simple: over all these years its lust for a network connection was so
strong that it managed to find a way to get to the Internet.


        Stefan

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#173828 — [REPOST] Re: Time quandry when dual boot with WinXP Pro

FromRichard Owlett <rowlett@cloud85.net>
Date2016-10-25 14:20 +0200
Subject[REPOST] Re: Time quandry when dual boot with WinXP Pro
Message-ID<sw8RZ-5yg-41@gated-at.bofh.it>
In reply to#173746
On 10/22/2016 3:15 PM, Stefan Monnier wrote:
>>>> 2. Debian 8.6 w MATE run from LIVE DVD _displays_ the correct time
>>>> 3. Debian 8.6 w MATE installed from DVD 1 of 13 with aid of custom
>>>> preseed.cfg
>>>> _displays_ a time 5 hours earlier.
>>> My guess: the Live DVD uses NTP so as not to depend on the hwclock
>>> whereas your installs don't.
>> As the saying goes, "that does not compute".  The machine in question has not
>> been connected to the internet, or any other network, for several years ;/
>
> Simple: over all these years its lust for a network connection was so
> strong that it managed to find a way to get to the Internet.
>
>
>          Stefan
>
>

You may have identified the problem after all ;/
What might the side effects of specifying use of NTP on 
installation be?
Is there something I can tweak in the *installed* system to 
duplicate what would have been done if the use of NTP had been 
specified in preseed.cfg?
Even given an affirmative answer to above, I can do a complete 
reinstall to assist in tracking possible side effects -- there is 
no valuable data on that machine.

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#173830 — Side effects of specifying use of NTP on installation???? - was [Re: Time quandry when dual boot with WinXP Pro]

FromRichard Owlett <rowlett@cloud85.net>
Date2016-10-25 14:20 +0200
SubjectSide effects of specifying use of NTP on installation???? - was [Re: Time quandry when dual boot with WinXP Pro]
Message-ID<sw8RZ-5yg-43@gated-at.bofh.it>
In reply to#173746
On 10/22/2016 3:15 PM, Stefan Monnier wrote:
>>>> 2. Debian 8.6 w MATE run from LIVE DVD _displays_ the correct time
>>>> 3. Debian 8.6 w MATE installed from DVD 1 of 13 with aid of custom
>>>> preseed.cfg
>>>> _displays_ a time 5 hours earlier.
>>> My guess: the Live DVD uses NTP so as not to depend on the hwclock
>>> whereas your installs don't.
>> As the saying goes, "that does not compute".  The machine in question has not
>> been connected to the internet, or any other network, for several years ;/
>
> Simple: over all these years its lust for a network connection was so
> strong that it managed to find a way to get to the Internet.
>
>
>          Stefan
>
>

You may have identified the problem after all ;/
What might the side effects of specifying use of NTP on 
installation be?
Is there something I can tweak in the *installed* system to 
duplicate what would have been done if the use of NTP had been 
specified in preseed.cfg?
Even given an affirmative answer to above, I can do a complete 
reinstall to assist in tracking possible side effects -- there is 
no valuable data on that machine.

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#173984

FromLisi Reisz <lisi.reisz@gmail.com>
Date2016-10-29 16:50 +0200
Message-ID<sxD7j-7tA-1@gated-at.bofh.it>
In reply to#173685
On Friday 21 October 2016 14:09:38 Richard Owlett wrote:
> I'm creating a preseed.cfg file for installing Debian 8.6 in a
> dual-boot enviroment with some version of MS Windows. There are
> two distinct use cases:
>     1. Two of my machines with WinXP Pro SP3
>     2. A remote (~1000 miles]friend with several machines - some
> with WinXP, others with
>        Windows 10 or later.
>
> I have discovered on my WinXP machine that:
>     1. WinXP _displays_ the correct time.
>        "Date and Time Properties" - Time Zone set to
>            (GMT-06:00)Central Time(US&Canada)
>            Automatically adjust clock for daylight saving changes
>     2. Debian 8.6 w MATE run from LIVE DVD _displays_ the correct
> time
>     3. Debian 8.6 w MATE installed from DVD 1 of 13 with aid of
> custom preseed.cfg
>        _displays_ a time 5 hours earlier.
>        The _display_ is independent of whether
>             d-i clock-setup/utc boolean true
>                         *OR*
>             d-i clock-setup/utc boolean false
>        is used in the preseed.cfg file.
>
> I'm confused.

Windows uses local time for the hardware clock, Linux uses UTC.  The Live CD 
presumably uses its common sense when looking at the machine on which it is 
required to run.  I don't know.  I am not familiar with the Live CD.

You are presumably at GMT-5, hence displaying 5 hours earlier on the 
assumption that your hardware clock is set to UTC.

Lisi

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#173985

FromFelix Miata <mrmazda@earthlink.net>
Date2016-10-29 17:30 +0200
Message-ID<sxDK1-7WB-19@gated-at.bofh.it>
In reply to#173984
Lisi Reisz composed on 2016-10-29 15:44 (UTC+0100):

> Windows uses local time for the hardware clock, Linux uses UTC.

By default, yes, but not necessarily:
https://wiki.archlinux.org/index.php/time#UTC_in_Windows
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

  Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

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#173987

FromLisi Reisz <lisi.reisz@gmail.com>
Date2016-10-29 18:20 +0200
Message-ID<sxEwq-pd-3@gated-at.bofh.it>
In reply to#173985
On Saturday 29 October 2016 16:29:11 Felix Miata wrote:
> Lisi Reisz composed on 2016-10-29 15:44 (UTC+0100):
> > Windows uses local time for the hardware clock, Linux uses UTC.
>
> By default, yes, but not necessarily:
> https://wiki.archlinux.org/index.php/time#UTC_in_Windows

Ah!  It is a very long time since I used Windows and I had not remembered how 
I used to deal with it.

Lisi

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