Re: [gentoo-user] Dual OS clock issues

[Fernando Rodriguez]

On Friday, June 05, 2015 12:04:41 PM Poison BL. wrote:
> On Fri, Jun 5, 2015 at 4:28 AM, Fernando Rodriguez <
> frodriguez.developer@×××××××.com> wrote:
>
> > On Thursday, June 04, 2015 12:06:51 PM Derek Ellison wrote:
> > > I have two HDD in a UEFI system. Windows 8 on one and Gentoo on the
> > other.
> > > Currently I have to update the clock everytime I boot to the other OS
and
> > > I'm wondering if there is a way I can avoid this? It's just starting to
> > get
> > > to be a pain to have to update it everytime.
> > >
> > > Any information would be most welcome.
> > >
> > > Thanks!
> >
> > Set Windows to use utc. See
> > https://wiki.archlinux.org/index.php/Time#UTC_in_Windows
> >
> > --
> > Fernando Rodriguez
> >
> >
> Given the fact that the builtin network time sync windows does ignores that
> feature altogether, it's generally a lot more sensible to configure the OS
> that actually cooperates rather than the one that only listens to settings
> when it suits it.

The main problem is that Windows will change the local time twice a year on 
DST zones, aside from NTP how can Linux tell if the time is adjusted? So if 
you boot while offline you may end up with the wrong time or you may have the 
time adjusted back and forth everytime you boot the other OS so any files 
touched during early boot end up with wrong times. Also on Windows that's the 
only setting, on Linux you also have you desktop environment settings to worry 
about so the simplest way to get it to work all year long is to set Windows to 
use UTC and disable time sync in Windows as shown in the link. Unless your 
system clock drifts badly the lack of time sync in Windows is not a problem 
for most users, the rest can use an NTP service on Windows too.

-- 
Fernando Rodriguez