Re: Time quandry when dual boot with WinXP Pro

[Richard Owlett <rowlett@cloud85.net>]

On 10/21/2016 11:46 AM, Doug wrote:
> On 10/21/2016 10:21 AM, Richard Owlett wrote:
> > On 10/21/2016 8:32 AM, tomas@tuxteam.de wrote:
> > > -----BEGIN PGP SIGNED MESSAGE-----
> > > Hash: SHA1
> > >
> > > On Fri, Oct 21, 2016 at 08:09:38AM -0500, Richard Owlett wrote:
> > > > I'm creating a preseed.cfg file for installing Debian 8.6 in a
> > > > dual-boot environment 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.
> > >
> > > Uh, oh. Microsoft and time handling. This won't end well :-/
> >
> > *ROFL*

*KEY* text text from original post was not quoted.
<begin restoration of text>

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
<end restoration of text>

> > > >     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
>
> Yes, It's Windows' fault. Unfortunately, I don't remember the
> details, but the cure is in the Registry.
> If you google the problem, somewhere along the way, you will find
> the Registry hack that fixes
> the problem.

*Begin test sequence*
power off
power on
start Debian - time displayed 08:00 AM
power off
power on
start WinXP Pro SP3 - time displayed 01:00 PM
"Shut Down Windows" choosing "Restart" menu option
Chose Debian from Grub menu - time displayed 08:00 AM
shut down with restart option
Run Debian from Live DVD - time displayed 13:12
Shut down with power off
power on
Run Debian from Live DVD - time displayed 13:12
*EOT*

CONCLUSION
Can *NOT* blame Microsoft Windows for EVERYTHING ;/


> --doug
> > > This observation alone suggests strongly that this installation
> > > "thinks" it should use the UTC (or any equivalent) time zone
> > > to fudge back its way from the hardware clock to the UTC.
> > >
> > > What is the value of d-i time/zone?
> >
> > Relevant lines of preseed.cfg are
> >
> > ### Clock and time zone setup
> > #d-i clock-setup/utc boolean false
> > d-i clock-setup/utc boolean true
> > d-i time/zone string US/Central
> > d-i clock-setup/ntp boolean false
> >
> >
> >
> > > regards
> > > - -- tomás