Time problems

Dotan Cohen dotancohen at gmail.com
Fri Jun 6 11:47:26 BST 2008

2008/6/5 Anne Wilson <cannewilson at googlemail.com>:
>> Are either of the machines dual-boot with an MS operating system? When
>> I was dual booting I had Windows XP Home Edition move my system clock
>> 2 hours (I am GMT+2) every time I booted that OS.
> The kde3 laptop does dual-boot with XP, although I rarely use it.  Certainly
> this problem has been with me ever since I installed on it, 6 months ago.  I
> think I have only logged into windows once in the whole of that time, and I
> certainly didn't notice any change then.  I don't think it's XP-related.

Maybe when Windows was installed it moved the system clock from UTC to
something else? It's been a _long_ time since I've done a Windows
installation, but I don't remember it ever asking about user
preferences, rather, just doing what it assumes is correct without
taking into account that some other OS's may also be installed (not to
bash Windows or anything).

Also, have you checked whether or not the machine is syncing with an
NTP server? Same server as the other machines?

What does the BIOS clock say?

Is this an IBM ThinkPad? If so, you might want to try asking in
ThinkPad-specific forums. A lot of ThinkPad hardware is unique enough
to cause maddening behaviour such as this. IBM (Lenovo) are not afraid
to make 'better' at the expense of 'standard'.

>> Also, as you see a 1 hour time difference, that makes me suspect a
>> daylight savings time error. Just something else to check.
> 'date' and 'hwclock --show' both indicate that all three machines are running
> BST -

By that reasoning, my machines are running at their WRST :)

> So - is system-clock the same as hwclock?  Or is there a third variable in the
> equation?

According to this document it is:

How are you setting the clock? With these:?
# hwclock --adjust
# hwclock --hctosys

Dotan Cohen


A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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