Timezone weirdness on dual boot machine

[David Scriven]

I'm running FC6 & Win XP on a dual boot machine - Intel Core 2 Duo, Intel 965
chipset

There a weird situation with the clock which shows up when I go from  FC6 to Win XP
and back. If the clock is correct in FC6 and you go to XP the clock is eight hours fast. 
If it is then corrected and you go back to FC6, it is eight hours slow. The zones are set

correctly for both systems - Pacific Time zone = GMT-8, so my guess is that FC6 is not 
correctly interpreting the timezone info when reading the system clock.

Anybody else come across this? - Is there something that I should set (or check
whether it's been set)?

[Bob Rowlands]

Yes, I've seen the same thing. When I fixed it on the FC6 end, I adjusted
date and time (which runs system-config-date) and noticed that there is now
a 'network time protocol'. Setting it up to get the time from the net, and
NOT the local clock. fixed the problem. Hope this helps.

On 10/31/06, David Scriven <davidwriter(a)yahoo.com&gt; wrote:
>  I'm running FC6 & Win XP on a dual boot machine - Intel Core 2 Duo, Intel
>  965 chipset
>
>  There a weird situation with the clock which shows up when I go from  FC6
>  to Win XP
>  and back. If the clock is correct in FC6 and you go to XP the clock is
>  eight hours fast.
>  If it is then corrected and you go back to FC6, it is eight hours slow.
>  The zones are set
>  correctly for both systems - Pacific Time zone = GMT-8, so my guess is
>  that FC6 is not
>  correctly interpreting the timezone info when reading the system clock.
>
>  Anybody else come across this? - Is there something that I should set (or
>  check
>  whether it's been set)?
>
>
>
>
>
>
>
>
>  --
>  fedora-list mailing list
>  fedora-list(a)redhat.com
>  To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
>  


-- 
Bob Rowlands <rowlands.bob(a)gmail.com&gt;

[Matthew Saltzman]

On Tue, 31 Oct 2006, David Scriven wrote:

>  I'm running FC6 & Win XP on a dual boot machine - Intel Core
> 2 Duo, 
>  Intel 965 chipset
>
>  There a weird situation with the clock which shows up when I go from FC6 
>  to Win XP and back. If the clock is correct in FC6 and you go to XP the 
>  clock is eight hours fast. If it is then corrected and you go back to 
>  FC6, it is eight hours slow. The zones are set correctly for both 
>  systems - Pacific Time zone = GMT-8, so my guess is that FC6 is not 
>  correctly interpreting the timezone info when reading the system clock.
>
>  Anybody else come across this? - Is there something that I should set 
>  (or check whether it's been set)? 
What's in /etc/sysconfig/clock?

If UTC=true, then Linux will store UTC (GMT) in the hardware clock on 
shutdown.  Windows only understands local time in the hardware clock. 
The Time Zone tab of system-config-date has a checkbox to set UTC or local 
time.

Note that having the hardware clock set to local time on a dual-boot 
machine can be annoying around the daylight savings changes.

-- 
 		Matthew Saltzman

Clemson University Math Sciences
mjs AT clemson DOT edu
http://www.math.clemson.edu/~mjs

[Benjamin Franz]

On Tue, 31 Oct 2006, David Scriven wrote:

>  I'm running FC6 & Win XP on a dual boot machine - Intel Core
> 2 Duo, Intel 965 chipset
>  
>  There a weird situation with the clock which shows up when I go from  FC6 to Win XP
>  and back. If the clock is correct in FC6 and you go to XP the clock is eight hours fast.
>
>  If it is then corrected and you go back to FC6, it is eight hours slow. The zones are set
>
>  correctly for both systems - Pacific Time zone = GMT-8, so my guess is that FC6 is not 
>  correctly interpreting the timezone info when reading the system clock.
>  
>  Anybody else come across this? - Is there something that I should set (or check
>  whether it's been set)? 
The problem is that your Linux install is assuming the system hardware 
clock is in GMT while XP is assuming it is in your local timezone. The 
solution is to set the Linux side to assume your system hardware clock is 
in your local timezone.

I'm not in front of my FC6 install at the moment so I can't be sure of the 
details, but it should be under 'Applications' -> 'System Settings'
-> 
'Date & Time' in the 'Timezone' tab of the dialog. Uncheck 'System
Clock 
uses UTC'. That should put a stop to the clock changes.

-- 
Benjamin Franz

"It is moronic to predict without first establishing an error rate
 for a prediction and keeping track of one’s past record of accuracy."
                    -- Nassim Nicholas Taleb, Fooled By Randomness