64-bit Heimdal/Cygwin, clock, daylight savings conundrum
Henry S. Thompson
ht@inf.ed.ac.uk
Wed Apr 9 14:20:00 GMT 2014
Andrey Repin writes:
>> I'm in the UK, where summer time started 10 days ago.
>
>> My Windows 8.1 laptop correctly gained an hour at that time.
>
>> Yesterday it gained _another_ hour :-(.
>
> This is suspicious. I hope, there was no changes to DST dates in UK recently?
No, moved by one day from 31/3 in 2013 to 30/3 just now.
> How does it appear to you?
> I.e. if your time zone in Windows set correctly, what time the system clock
> show, and how it is converted to UTC?
Windows thinks I'm in (UTC) Dublin, Edinburgh, Lisbon, London, which
is correct. Windows shows the correct time, as does Cygwin 'date'
> Do you have real time synchronization set up?
Yes, that's how I got the time fixed. I'm running ntpd from the
Meinberg distribution.
> Could it be a server issue at this point? Is it in the same timezone, as
> yourself?
No -- same timezone, we're all in the same city, Edinburgh. I'm not
aware of anyone else with this problem.
>> So I went to work on what I thought was the underlying problem, the
>> mistaken time. Fixed that, eventually, by fiddling with BIOS clock
>> and its relation to the system clock.
>
>> But the kinit problem didn't go away.
>
>> However, _if_ I set the time one hour forward again, kinit succeeds.
>
>> True weirdness follows. I have 32-bit install as well (for xemacs)
>> (Cygcheck attached to previous message). Problem does _not_ manifest
>> itself there. kinit works _regardless_ of what the windows clock
>> says.
Note that I can't reproduce this anymore :-(. That is, 32-bit and
64-bit now both require the time to be one hour forward of the correct
time for kinit to work.
ht
--
Henry S. Thompson, School of Informatics, University of Edinburgh
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URL: http://www.ltg.ed.ac.uk/~ht/
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