[Debian-eeepc-devel] clock lacks behind

[Dick Middleton]

On 05/11/10 19:43, Juha Heinanen wrote:
> i call ntpdate-debian when network interface comes up and have verified
> that after that, date shows correct time.  during the day, clocks starts
> to lack behind a few minutes per hour.

Wow, that's a lot.
>
> could this have something to do with dynamic cpu frequency scaling?

I doubt it.  The clock is a hardware thing.  It is powered by the bios 
battery and is independent of the computer. The system reads the time 
from the bios.  The clock provides 'ticks' to the operating system by 
interrupt so the system clock can be updated.

If your clock is running so slow it will be hardware related.  Minutes 
per hour is broken and should probably be treated as a fault.  You 
should expect drift within 1:10^5 or about 1sec per day.

I suggest you boot into the bios and monitor the clock there to get an 
idea of the raw timekeeping ability over say 24h.

Dick