Re: Wrong clock initialization

[george anzinger <george@mvista.com>]

David Balazic wrote:
> george anzinger wrote:
> 
>>David Balazic wrote:
>>
>>>Hi!
>>>
>>>When the kernel is booted ( ia32 version at least ) , it reads
>>>the time from from the hardware CMOS clock , _assumes_ it is in
>>>UTC and set the system time to it.
>>>
>>>As almost nobody runs their clock in UTC, this means that the system
>>>is running on wrong time until some userspace tool corrects it.
>>>
>>>This can lead to situtation when time goes backwards :
>>>
>>>timezone is 2hours east of UTC.
>>>UTC time : 20:00
>>>local time : 22:00
>>>
>>>System time between boot and userspace fix : 22:00UTC
>>>System time after fix : 20:00UTC
>>>
>>>Comments ?
>>
>>During shut down my system "says" it is setting the CMOS clock from
>>the kernel clock.  I would expect this to correct the problem.  Is
>>this a distro thing?
> 
> 
> The time is properly converted first to be localtime, if your CMOS
> is localtime. So this does not fix anything.

Ouch!  That is a real disconnect.  Time to fix something.
> 
> 
>>In any case, this would seem to make the problem go away after the
>>first shutdown (if you don't dual boot with something other than Linux :).
> 
> 
> 

-- 
George Anzinger   george@mvista.com
High-res-timers:  http://sourceforge.net/projects/high-res-timers/
Preemption patch: http://www.kernel.org/pub/linux/kernel/people/rml