How to coordinate the clock when dual-booting with Windows
jl.ffm at gmx.net
Tue Dec 12 02:41:16 UTC 2017
On 11.12.2017 22:07, Drew Einhorn wrote:
> NTP is probably assuming system clock is UTC and correcting based on
> your time zone settings. This way ntp can assume all clocks are UTC and
> not have figure out all the relevant time zone corrections.
> Does this make sense for your time zone?
> Remote users can set their time zone environment variables for their
> local time zone. Things work out nicely on Unix or Linux based systems.
> I don't know If there is a right way to configure Windows so it knows
> the hardware clock is UTC and the user time zone is different. If not,
> you have different issues depending on whether the hardware clock is UTC
> or local time. You may have to decide which issues are the bigger problem.
> Windows may screw things up for spring and fall daylight savings
> adjustments, if Windows thinks the hardware is on local time when it's
> really on UTC.
> If the latest updates are not installed, your systems may change to or
> from daylight savings on the wrong weekend. This can be an issue for all
> operating systems.
> My daughter's alarm clock switched itself from daylight savings time to
> standard time on the wrong weekend this year. And, there is no way to
> update the rules for when to change.
> On December 11, 2017, at 12:47 PM, Kevin O'Gorman <kogorman at gmail.com>
> On Sun, Dec 10, 2017 at 11:23 PM, Grizzly via ubuntu-users
> <ubuntu-users at lists.ubuntu.com <mailto:ubuntu-users at lists.ubuntu.com>>
> 10 December 2017 at 20:41, Kevin O'Gorman wrote:
> Re: How to coordinate the clock whe (at least in part)
> >On Sun, Dec 10, 2017 at 12:59 PM, Grizzly via ubuntu-users <
> >ubuntu-users at lists.ubuntu.com
> <mailto:ubuntu-users at lists.ubuntu.com>> wrote:
> >> 10 December 2017 at 15:52, Colin Law wrote:
> >> Re: How to coordinate the clock whe (at least in part)
> >> >On 10 December 2017 at 15:45, Liam Proven <lproven at gmail.com <mailto:lproven at gmail.com>> wrote:
> >> >
> >> >> On 10 December 2017 at 10:42, Colin Law <clanlaw at gmail.com <mailto:clanlaw at gmail.com>> wrote:
> >> >> >
> >> >> > The clock is not normally an issue when dual booting.
> >> >>
> >> >> It bally well is for me!
> >> >>
> >> >> E.g. if it's set to local time, both OSes move the system clock
> >> >> forward or backwards when daylight savings times begins or ends,
> >> >> resulting in a 2h discrepancy.
> >> >>
> >> >> My solution: minimize use of Windows. I boot it a couple of times a
> >> >> year, if that, normally.
> >> >>
> >> >
> >> >Interesting, I have never seen that. I assumed the system clock was in
> >> UTC,
> >> >and so would not change with DST. You may be right about that though, I
> >> >have no evidence either way. However I would have thought it would re-sync
> >> >the next time ntpdate or whatever it is that does the auto timesync ran.
> >> Its on a tab in date/time that not many people visit, default is off
> >> That's what I was hoping, but I cannot find anything about NTP in my
> >Windows 10.
> Must admit I was unsure if the same controls carry forward to later
> windoz, (I
> stopped at Win7) it looks like they do
> only difference appears that you only see the internet time when you
> "Change date time"
> here it (now) has a number of possible time server, IIRC it came
> with only two
> (unreliable), the rest I added later
> there is a reg entry
> "1"="time.windows.com <http://time.windows.com>"
> "2"="188.8.131.52 <http://184.108.40.206>"
> "3"="0.uk.pool.ntp.org <http://0.uk.pool.ntp.org>"
> "4"="1.uk.pool.ntp.org <http://1.uk.pool.ntp.org>"
> "6"="ntp2b.mcc.ac.uk <http://ntp2b.mcc.ac.uk>"
> "5"="ntp2a.mcc.ac.uk <http://ntp2a.mcc.ac.uk>"
> "7"="ntp2c.mcc.ac.uk <http://ntp2c.mcc.ac.uk>"
> "8"="ntp2d.mcc.ac.uk <http://ntp2d.mcc.ac.uk>"
> "9"="ntp.exnet.com <http://ntp.exnet.com>"
> the chosen NTP server does propagate to other Reg entries
> but you can manually add direct in the dialogue if you don't want to
> delve in
> This is interesting, but I'm uncertain how to use it. I found the list
> of servers in the registry. I didn't put them there, but there are 5,
> and number 5 appears as the default. It is time-b.nist.gov
> <http://time-b.nist.gov> which I sure hope is not unreliable. However,
> I still get Windows showing the time off by 8 hours when it boots up,
> and I'm supposing that's because it is using the time in the BIOS DRAM,
> but I'm unsure because as near as I can tell the BIOS is set to local
> time; at least that's what I see when I'm in BIOS setup. Frankly I'm
> all confused.
> It would be nice if Windows would use nist.gov <http://nist.gov> and
> apply the timezone, ignoring BIOS completely.
> Kevin O'Gorman
> #define QUESTION ((bb) || (!bb)) /* Shakespeare */
> Please consider the environment before printing this email.
Could it be that You did not even think of trying to use a search engine
for your problem?
So, i'm a nice guy and did just one little search [coordinate time dual
boot system windows linux] and will paste You _some_ not even all of the
links i found obviously quite fitting to Your question:
I'm pretty sure the information You asked for is hidden somewhere in
these links ...! ;-)
Hope i did You a little favor!
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