Red Hat Bugzilla – Bug 183102
Dual booting shifts time forward despite correct settings.
Last modified: 2007-11-30 17:11:25 EST
Description of problem:
Dual booting into FC5 test 3 and then back into OS X (10.4.5) shifts time
forward by one hour despite clock time, time zone and no UTC having been set
correctly in both platforms.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot into OS X, make sure the time is set correctly.
2. Boot into FC5 test 3 ".
3. Boot into OS X and ".
Time shifts forward by one hour.
Time remains the same
Ok, I'm not sure where the problem might be. I would like to ask you few
questions before we can get any further.
Is the shift exactly one hour?
Will the error keep increasing if you repeat the steps to reproduce without
correcting time in OS X? Or it stays at one hour?
Did you enable ntp service in FC?
Yes, exactly one hour.
Error stays the same, regardless of repeated reboots between FC and OS X.
Yes, I enabled ntp in FC. The time is shown correctly in FC.
Looks like the systems differ in the way the clock is stored. What happens when
you set both systems to store time in UTC?
I don't see any way to do that in OS X.
Please, check your (on Fedora) /etc/sysconfig/clock. You can try to use
UTC=false, so your both OS will be use localtime.
For more details see "man hwclock":
... Indicates that the Hardware Clock is kept in Coordinated Universal Time
or local time, respectively. It is your choice whether to keep your clock in
UTC or local time, but nothing in the clock tells which you've chosen.
It means all your system should save to HW clock same time.
Were already set.
Brian, could you look at:
It looks like you will have to reset an offset that is stored in nvram.
Weird. After I accessed /etc/sysconfig/clock, I no longer have a problem. I
didn't make any changes in the file at all. One other thing I did was to check
the clock preferences in the panel, but I didn't make any changes there either.