Linux vs. Winblows: Prize the Clock

frkstein · 09-16-2002, 09:26 PM

An internal struggle is going on with my machine. I dual boot and everytime I switch between OS's the system clock gets thrown off. Each time I go from Linux to Windows to Linux, the clock loses 4 hours. How can I stop this?

DavidPhillips · 09-16-2002, 09:31 PM

set the localtime in linux and windows the same

frkstein · 09-16-2002, 09:53 PM

I tried adjusting my Linux clock to the correct time. I rebooted, went into the Bios clock to confirm that it had the right time, which it did. I then let it boot into windows. It also had the correct time. I rebooted, checked the Bios clock again, also correct. Let it boot into Linux, -4 hours. I have my system setup for EDT, which should be correct. What is causing the conflict?

KnightAbel · 09-16-2002, 11:30 PM

I'd like to know as well

it offset me negative two hours once. only once though, rebooting took care of it.

DavidPhillips · 09-17-2002, 02:38 AM

it's likely that the hardwareclock is set to something other than localtime

---SLACKWARE---

run timeconfig

it will set the link in /etc/localtime

and set the proper setting in /etc/hardwareclock

DavidPhillips · 09-17-2002, 02:41 AM

---SLACKWARE---

if you don't have timeconfig

echo localtime > /etc/hardwareclock

date 09170241

DavidPhillips · 09-17-2002, 02:46 AM

the above is for slack

redhat is different

see the file /etc/sysconfig/clock

set the ZONE="your/zone", UTC=false, and ARC=false

also run hwclock

[root@Firedragon root]# hwclock
Tue 17 Sep 2002 02:44:33 AM CDT 0.043256 seconds

Ztyx · 09-17-2002, 02:58 AM

You haven't set up your clock to automatically sync with a time-server somewhere?

DavidPhillips · 09-17-2002, 03:00 AM

Also Mandrake is the same as redhat

However instead of a link in /etc/localtime

Redhat and Mandrake copy the zone file to /etc/localtime

you can replace it with a link if you want so it can be confirmed where it points.

DavidPhillips · 09-17-2002, 03:06 AM

One other thing

[root@Firedragon root]# ls /usr/share/zoneinfo/US
Alaska Arizona Eastern Hawaii Michigan Pacific
Aleutian Central East-Indiana Indiana-Starke Mountain Samoa

you would set /etc/sysconfig/clock to look like this

UTC=false
ARC=false
ZONE="US/Eastern"

DavidPhillips · 09-17-2002, 03:14 AM

you can cp /usr/share/zoneinfo/US/Eastern /etc/localtime

or rm /etc/localtime; ln -s /usr/share/zoneinfo/US/Eastern /etc/localtime

DavidPhillips · 09-17-2002, 03:20 AM

In Redhat you can also use

setup

frkstein · 09-18-2002, 11:53 AM

Well, I tried everything suggested. I made sure that the hardware clock is set to the correct time. The BIOS clock is showing the correct time, windows clock shows the right time. But when I bring up Linux, the time is always -4 hours. Any other suggestions on how to fix this?

Ztyx · 09-18-2002, 12:56 PM

You could make a script which sets the clock +4 hours everytime you start linux, and the opposite when it shuts down...
It's a bad fix, I know, although it's better than nothing.

DavidPhillips · 09-20-2002, 07:19 PM

what is your timezone,
what do you get from the date command,
what do you get from the hwclock command