BootCamp clock issues

R.Youden · Jun 15, 2007, 03:55 AM

I don't know if anyone else has found this, but when I boot out of Windows and into Mac OSX my clock jumps forward by 1 hour.

Has anyone else seen this and is there an easy fix?

Does this have anything to do with British Day Light Savings etc...

Thanks.

azizane · Jun 15, 2007, 08:14 AM

I have the same problem, don't worry you're not alone. Don't know about a fix though

MajikalMan · Jun 24, 2007, 09:13 PM

My guess is that the two operating systems don't recognize the system clock's settings for time zone. I would wager that the time zone variable is local within the operating system, hence, the setting isn't conserved between Windows and OS X. I am located in Eastern Standard Time (GMT -5) and unsurprisingly, the time is always 5 hrs in advance on my Windows side. Attempting to correct the time manually would be futile since that would change the system clock. This is the solution I found in another forum was the edit the Windows registry at:

Code:

HKEY_LOCAL_MACHINE
 SYSTEM
  CurrentControlSet
   Control
    TimeZoneInformation
     RealTimeIsUniversal

and set it to a DValue of 1. I have yet to try this myself so good luck!

flopticalcube · Jun 24, 2007, 09:30 PM

I can confirm that the above fix does indeed work.

Thanks, MajikalMan.

armani · Aug 20, 2007, 04:14 PM

Quote:

Originally Posted by MajikalMan

My guess is that the two operating systems don't recognize the system clock's settings for time zone. I would wager that the time zone variable is local within the operating system, hence, the setting isn't conserved between Windows and OS X. I am located in Eastern Standard Time (GMT -5) and unsurprisingly, the time is always 5 hrs in advance on my Windows side. Attempting to correct the time manually would be futile since that would change the system clock. This is the solution I found in another forum was the edit the Windows registry at:

Code:

HKEY_LOCAL_MACHINE
 SYSTEM
  CurrentControlSet
   Control
    TimeZoneInformation
     RealTimeIsUniversal

and set it to a DValue of 1. I have yet to try this myself so good luck!

I tried it, but I can only go to Time Zone Information and I can not see Real Time Is Universal.

flopticalcube · Aug 20, 2007, 04:16 PM

Quote:

Originally Posted by armani

I tried it, but I can only go to Time Zone Information and I can not see Real Time Is Universal.

You have to add that yourself.

plinden · Aug 20, 2007, 04:20 PM

Quote:

Originally Posted by armani

I tried it, but I can only go to Time Zone Information and I can not see Real Time Is Universal.

Add a new DWORD (Edit/New/DWORD value) called RealTimeIsUniversal

l'homme · Aug 20, 2007, 09:07 PM

Quote:

Originally Posted by plinden

Add a new DWORD (Edit/New/DWORD value) called RealTimeIsUniversal

doesn't work for me :S

SDAVE · 09:32 PM

Quote:

Originally Posted by l'homme

doesn't work for me :S

Did you set the DValue to 1 afterwards?

I just tried it and it worked!

DeadSirius · Sep 1, 2007, 03:21 AM

I've done this, and it's changed things such that Mac OS X always boots up with the correct time, as does Windows XP. However, after a while Windows sets the time forward by 7 hours. I've tried adjusting the time zone, but it has no effect. I can't keep Windows from setting itself 7 hours early. I live in the PDT zone.

pavelbure · Sep 2, 2007, 04:41 PM

mine moves by 4 hours. i will try this and see.

pavelbure · Sep 2, 2007, 05:34 PM

Quote:

Originally Posted by pavelbure

mine moves by 4 hours. i will try this and see.

i could not edit the registry. i got a "registry editing has been disabled by your administrator" which is funny, i thought i was the administrator of my computer.

DeadSirius · Sep 2, 2007, 10:34 PM

Weird... Since booting in OS X seems to correct the startup time for XP, I tried unchecking the XP control box that tells the machine to sync to the internet, so that it would stop setting the clock forward by 7 hours. Yet XP still insists on setting it forward after a few minutes.

doofusjim · Sep 6, 2007, 08:57 PM

hey guys.
Just wondering how do you go to the windows registry? how do you get there?

thanks

flopticalcube · Sep 6, 2007, 09:00 PM

Quote:

Originally Posted by doofusjim

hey guys.
Just wondering how do you go to the windows registry? how do you get there?

thanks

RegEdit

odinsride · Oct 23, 2007, 08:56 PM

Quote:

Originally Posted by DeadSirius

Weird... Since booting in OS X seems to correct the startup time for XP, I tried unchecking the XP control box that tells the machine to sync to the internet, so that it would stop setting the clock forward by 7 hours. Yet XP still insists on setting it forward after a few minutes.

My windows time jumps forward as well after doing the registry hack. Is there a fix for this?

Bill Gates · Oct 23, 2007, 10:43 PM

Quote:

Originally Posted by odinsride

My windows time jumps forward as well after doing the registry hack. Is there a fix for this?

That's due to the Boot Camp time synching application. I haven't looked into it, but if you disable it, the time should be spot on. I don't know why Apple didn't use the registry key, to use UTC, and instead chose to use their shoddy time program.

coocooforcocoap · Oct 24, 2007, 10:22 AM

i had the same problem and was baffled but after upgrading my parallels install, it went away!

rainforest1155 · Nov 6, 2007, 11:08 PM

What I did to fix this problem was to disable the automatic daylight adjustment in Windows. You can do this in the timezone settings when you double click on the clock in the taskbar.

Sebastian

dangkevin · Nov 10, 2007, 11:23 AM

Quote:

Originally Posted by Bill Gates

That's due to the Boot Camp time synching application. I haven't looked into it, but if you disable it, the time should be spot on. I don't know why Apple didn't use the registry key, to use UTC, and instead chose to use their shoddy time program.

Hi,

How do you disable the time synching application in boot camp?

Kevin Dang.

Bill Gates · Nov 10, 2007, 08:01 PM

Quote:

Originally Posted by dangkevin

Hi,

How do you disable the time synching application in boot camp?

Kevin Dang.

Quote:

Originally Posted by Bill Gates

I haven't looked into it

Try removing it from your startup list using msconfig. However, like I said, I haven't looked into it.

odinsride · Jan 2, 2008, 08:48 PM

any resolution yet for the time jumping forward problem? it's still doing it for me...

autumnrain · Jan 3, 2008, 09:20 PM

everyone is just like this ,don't be so suprised

m1ss1ontomars · Jan 8, 2008, 08:26 PM

Quote:

Originally Posted by autumnrain

everyone is just like this ,don't be so suprised

That's right; this is a Boot Camp known issue. It's because of the different ways Windows and Mac OS X store and read the system time with respect to your time zone.

jeamland · Aug 10, 2008, 08:09 PM

SOLUTION:

1 - set the realtimeisuniversal setting as described above.
2 - go into control panel -> administrative tools -> services (or "manage computer" and go to services) and select "apple time service". set this to be DISABLED and it won't change your clock again.

works fine

Jun 15, 2007, 03:55 AM	#1
R.Youden macrumors 68020 Join Date: Apr 2005	BootCamp clock issues I don't know if anyone else has found this, but when I boot out of Windows and into Mac OSX my clock jumps forward by 1 hour. Has anyone else seen this and is there an easy fix? Does this have anything to do with British Day Light Savings etc... Thanks.

Jun 24, 2007, 09:13 PM	#3
MajikalMan macrumors newbie Join Date: Jun 2007	My guess is that the two operating systems don't recognize the system clock's settings for time zone. I would wager that the time zone variable is local within the operating system, hence, the setting isn't conserved between Windows and OS X. I am located in Eastern Standard Time (GMT -5) and unsurprisingly, the time is always 5 hrs in advance on my Windows side. Attempting to correct the time manually would be futile since that would change the system clock. This is the solution I found in another forum was the edit the Windows registry at: Code: HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Control TimeZoneInformation RealTimeIsUniversal and set it to a DValue of 1. I have yet to try this myself so good luck!

Jun 24, 2007, 09:30 PM	#4
flopticalcube macrumors 601 Join Date: Sep 2006	I can confirm that the above fix does indeed work. Thanks, MajikalMan. __________________ Read the Rules / Search the Forums / Use a Descriptive Title Reset your PRAM / Reset your SMC / Boot into Safe Mode

Sep 1, 2007, 03:21 AM	#10
DeadSirius macrumors member Join Date: Sep 2006	I've done this, and it's changed things such that Mac OS X always boots up with the correct time, as does Windows XP. However, after a while Windows sets the time forward by 7 hours. I've tried adjusting the time zone, but it has no effect. I can't keep Windows from setting itself 7 hours early. I live in the PDT zone. __________________ Mac Pro 3.0 Ghz, 5 GB RAM

Sep 2, 2007, 10:34 PM	#13
DeadSirius macrumors member Join Date: Sep 2006	Weird... Since booting in OS X seems to correct the startup time for XP, I tried unchecking the XP control box that tells the machine to sync to the internet, so that it would stop setting the clock forward by 7 hours. Yet XP still insists on setting it forward after a few minutes. __________________ Mac Pro 3.0 Ghz, 5 GB RAM

Jun 15, 2007, 08:14 AM	#2
azizane macrumors member Join Date: Nov 2006	I have the same problem, don't worry you're not alone. Don't know about a fix though

Sep 2, 2007, 04:41 PM	#11
pavelbure macrumors 6502 Join Date: Feb 2007	mine moves by 4 hours. i will try this and see.

Sep 6, 2007, 08:57 PM	#14
doofusjim macrumors newbie Join Date: Jul 2007	how do u get onto the windows registry? hey guys. Just wondering how do you go to the windows registry? how do you get there? thanks

Oct 24, 2007, 10:22 AM	#18
coocooforcocoap macrumors regular Join Date: Sep 2007 Location: kathmandu, nepal	i had the same problem and was baffled but after upgrading my parallels install, it went away! __________________  Small A/V Studio retrofitted with new aluminum iMacs and unibody MBPs 

Nov 6, 2007, 11:08 PM	#19
rainforest1155 macrumors newbie Join Date: Oct 2007	What I did to fix this problem was to disable the automatic daylight adjustment in Windows. You can do this in the timezone settings when you double click on the clock in the taskbar. Sebastian

Jan 2, 2008, 08:48 PM	#22
odinsride macrumors 6502a Join Date: Apr 2007 Location: Reston, VA	any resolution yet for the time jumping forward problem? it's still doing it for me... __________________ "It is just that heavy metal musicians write in minor keys, and when you do that, you frighten people." - Ronnie James Dio Flickr

Jan 3, 2008, 09:20 PM	#23
autumnrain macrumors newbie Join Date: Jan 2008	everyone is just like this ,don't be so suprised

Aug 10, 2008, 08:09 PM	#25
jeamland macrumors newbie Join Date: Nov 2006	SOLUTION: 1 - set the realtimeisuniversal setting as described above. 2 - go into control panel -> administrative tools -> services (or "manage computer" and go to services) and select "apple time service". set this to be DISABLED and it won't change your clock again. works fine

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