Re: [gentoo-user] Re: Winter clock change did not happen

[Kevin O'Gorman]

On Sun, Oct 31, 2010 at 10:24 AM, Mick <michaelkintzios@×××××.com> wrote:

> On Sunday 31 October 2010 17:03:32 Graham Murray wrote:
> > Mick <michaelkintzios@×××××.com> writes:
> > > MSWindows changed it to winter time when I eventually booted into it.
> > > Gentoo wouldn't show the winter time until I had first booted into
> > > MSWindows.  If the setting CLOCK="local" is meant to make Gentoo use
> the
> > > hardware clock like MSWindows does, why it did not behave the same as
> > > MSWindows with the DST change?
> >
> > Gentoo uses the "CLOCK=" value when it boots. It uses this to determine
> > the initial system time. If you set to 'UTC' then the appropriate
> > timezone offset will be applied. If it is set to 'LOCAL' then Gentoo
> > assumes (and it has to) that the HWClock is set to the correct local
> > time, including the correct Daylight Saving correction.
> >
> > So, if Gentoo was running at the time of the clock change then the
> > system time would have changed from Summer to Winter time. However, if
> > Gentoo was not running and you booted it this morning then it would,
> > legitimately, assume that HW Clock had been set to the correct local
> > time prior to it be booted. When you booted into MSWindows, it changed
> > the time on the HW Clock to be Winter time (ie it put it back 1 hour),
> > so that next time you booted into Gentoo the HW clock was set to the
> > correct local time. With CLOCK="LOCAL", when you boot for the first time
> > after a Summer/Winter time change, Gentoo has no way to telling whether
> > or not something else (eg MSWindows or manually via the BIOS setup) has
> > already changed the HW clock to Summer/Winter time.
>
> Thank you Graham for your very detailed reply!  I understand now why the
> problem exists.  I have used the registry change suggested by Nuno on Win7
> and
> will see what gives next time DST changes.  I just hope that it'll work
> without having *both* OS shifting the clock by one hour ...
>
> The more I read this page[1] the more I am tempted to format MSWindows out
> of
> this box whether the warranty is still valid or not!
>
> [1] http://www.cl.cam.ac.uk/~mgk25/mswish/ut-rtc.html<http://www.cl.cam.ac.uk/%7Emgk25/mswish/ut-rtc.html>
> --
> Regards,
> Mick
>

You guys had me scared for a bit.  But I'm in the USA, where the change
happens in
the morning of the first Sunday in November, which will be the 7th.

I can wait.

++ kevin


-- 
Kevin O'Gorman, PhD