Re: what VESA/vga AM I useing?

From	Rich <rich@example.invalid>
Newsgroups	comp.os.linux.misc, alt.os.linux.slackware, alt.os.linux.debian
Subject	Re: what VESA/vga AM I useing?
Date	2014-10-24 18:38 +0000
Organization	My Linux Box
Message-ID	<m2e6br$f7m$1@dont-email.me> (permalink)
References	(6 earlier) <87h9yt1l0x.fld@barrow.com> <87ppdhe6od.fsf@thumper.dhh.gt.org> <87d29h1ik7.fld@barrow.com> <87lho5e51q.fsf@thumper.dhh.gt.org> <878uk51ghf.fld@barrow.com>

Cross-posted to 3 groups.

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In comp.os.linux.misc Floyd L. Davidson <floyd@apaflo.com> wrote:
> John Hasler <jhasler@newsguy.com> wrote:
> >Floyd L. Davidson writes:
> >> I've had multiple systems set to local time since the early 90's.
> >> They all switch automatically.
> >
> >I've had multiple systems with the BIOS clock set to UTC since the early
> >90's.  They don't need to switch.  Everything just works.

> If they don't "switch" then you wake up in the morning
> and the all your neighbors have switched, and you aren't
> on the same time they are.

> Run the date command, and you'll see that in fact is
> *has* switched.  In my case one day it says AKDT and the
> next it says AKST.  Or the other way around.

> "Switch" means go from one standard to the other.

If the HW clock and system time are set to UTC, and you unplug your
computer from any network interfaces, and you shutdown all wireless
interfaces (i.e., zero external network connections), and you have your
/etc/localtime file set to your correct local timezone, then the
following will still happen (this is for the USA's switching):

1) if you manually run the "date" command at exactly 01:59:59 on Nov.
2, 2014, it will report 1:59:59 EDT.

2) if you manually run the "date" command exactly one second later
(doing nothing else with date and time), at what would normally be
02:00:00 on Nov. 2, 2014, instead of showing 02:00:00 it will instead
report 01:00:00 EST

Or, if you have a clock running on your desktop, then at 01:59:59 it
will show 01:59:59, and one second later it will show 01:00:00.

I keep a small transparent "oclock" running on screen on most of my
machines.  I've occasionally been using one of the systems at the
instant of the shift.  The hour hand on oclock jumps forward one hour
in the spring, and it jumps back one hour in the fall, at the appointed
times.

But the stored time value (UTC) within both clocks did not change at
all.  The system libraries simply translated to localtime from UTC
automatically for me, and simply performed different translations based
upon what time of the year the request occurred.

That's what is meant by "everything just works".  The clocks do not get
reprogrammed at all, but the visible time to you is the correct time
you expect, even with no sync. to any external network time source.

Thread

what VESA/vga *AM* I useing? not.socialnetwork@gmail.com - 2014-10-23 06:07 +0000
  Re: what VESA/vga *AM* I useing? "Nuno J. Silva (aka njsg)" <njsg@invalid.invalid> - 2014-10-23 08:22 +0000
  Re: what VESA/vga *AM* I useing? not.socialnetwork@gmail.com - 2014-10-23 12:04 +0000
    Re: what VESA/vga *AM* I useing? Joe Beanfish <joebeanfish@nospam.duh> - 2014-10-23 13:25 +0000
      Re: what VESA/vga *AM* I useing? not.socialnetwork@gmail.com - 2014-10-24 06:14 +0000
  Re: what VESA/vga *AM* I useing? ebenZEROONE@verizon.net (Hactar) - 2014-10-23 21:45 -0400
    Re: what VESA/vga *AM* I useing? "Nuno J. Silva (aka njsg)" <njsg@invalid.invalid> - 2014-10-24 06:56 +0000
    Re: what VESA/vga *AM* I useing? Unknown <dog@gmail.com> - 2014-10-26 03:07 +0000
  Re: what VESA/vga *AM* I useing? "Chester A. Arthur" <deadprez@whitehouse.com> - 2014-10-23 22:18 -0500
    Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-23 22:09 -0800
      Re: what VESA/vga *AM* I useing? "Nuno J. Silva (aka njsg)" <njsg@invalid.invalid> - 2014-10-24 07:07 +0000
        Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-24 00:02 -0800
      Re: what VESA/vga *AM* I useing? Rich <rich@example.invalid> - 2014-10-24 12:46 +0000
        Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-24 05:39 -0800
          Re: what VESA/vga *AM* I useing? John Hasler <jhasler@newsguy.com> - 2014-10-24 09:31 -0500
            Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-24 08:37 -0800
              Re: what VESA/vga *AM* I useing? John Hasler <jhasler@newsguy.com> - 2014-10-24 12:09 -0500
                Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-24 09:30 -0800
                Re: what VESA/vga *AM* I useing? John Hasler <jhasler@newsguy.com> - 2014-10-24 12:44 -0500
                Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-24 10:15 -0800
                Re: what VESA/vga *AM* I useing? Rich <rich@example.invalid> - 2014-10-24 18:38 +0000
                Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-24 11:09 -0800
                Re: what VESA/vga *AM* I useing? Richard Kettlewell <rjk@greenend.org.uk> - 2014-10-24 21:31 +0100
                Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-24 12:53 -0800
                Re: what VESA/vga *AM* I useing? Chris Vine <chris@cvine--nospam--.freeserve.co.uk> - 2014-10-25 13:56 +0100
                Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-25 05:12 -0800
                Re: what VESA/vga *AM* I useing? John Hasler <jhasler@newsguy.com> - 2014-10-25 09:24 -0500
                Re: what VESA/vga *AM* I useing? Rich <rich@example.invalid> - 2014-10-26 00:15 +0000
                Re: what VESA/vga *AM* I useing? John Hasler <jhasler@newsguy.com> - 2014-10-24 14:17 -0500
                Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-24 12:55 -0800
                Re: what VESA/vga *AM* I useing? John Hasler <jhasler@newsguy.com> - 2014-10-24 16:23 -0500
                Re: what VESA/vga *AM* I useing? Richard Kettlewell <rjk@greenend.org.uk> - 2014-10-24 22:33 +0100
                Re: what VESA/vga *AM* I useing? Rich <rich@example.invalid> - 2014-10-24 18:28 +0000
                Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-24 10:43 -0800
                Re: what VESA/vga *AM* I useing? Rich <rich@example.invalid> - 2014-10-24 22:52 +0000
                Re: what VESA/vga *AM* I useing? Eef Hartman <E.J.M.Hartman@gmail.com> - 2014-10-24 18:57 +0000
          Re: what VESA/vga *AM* I useing? Rich <rich@example.invalid> - 2014-10-24 17:04 +0000
          Re: what VESA/vga *AM* I useing? Eef Hartman <E.J.M.Hartman@gmail.com> - 2014-10-24 17:09 +0000
            Re: what VESA/vga *AM* I useing? Allodoxaphobia <knock_yourself_out@example.net> - 2014-10-24 21:02 +0000
              Re: what VESA/vga *AM* I useing? John Hasler <jhasler@newsguy.com> - 2014-10-24 16:30 -0500
                Re: what VESA/vga *AM* I useing? Martin <m@abc.invalid> - 2014-10-25 14:40 +0200
                Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-25 04:50 -0800
                Re: what VESA/vga *AM* I useing? John Hasler <jhasler@newsguy.com> - 2014-10-25 09:17 -0500
                Re: what VESA/vga *AM* I useing? floyd@apaflo.com (Floyd L. Davidson) - 2014-10-25 13:26 -0800
                Re: what VESA/vga *AM* I useing? John Hasler <jhasler@newsguy.com> - 2014-10-25 16:49 -0500
                Re: what VESA/vga *AM* I useing? Martin <m@abc.invalid> - 2014-10-25 19:54 +0200

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