Alexander Todorov wrote:
Since yesterday the result is:
1) set bios time to the correct value
2) booted the system and turned off ntp
3) left the system running for several hours then shut it down
4) turned it on today and the clock drift is less than 5 minutes. Much
better than 20 minutes.
See earlier post on this thread by Michal Jaegermann. He's also seeing
similar problems.
ntp is limited to fixing drifts of 500 ppm (0.05%). If the clock drift
is higher than that for some reason, it can't fix it. I had a system
where I had to manually tweak the "tick rate" by adding this to
/etc/rc.local:
/sbin/adjtimex --tick=10195
where "10195" was relative to the expected "10000" tick rate, and had to
be determined by measuring the actual drift rate. A kernel upgrade
eventually made this unnecessary. (This could happen if the kernel had a
flaw that caused timer interrupts to be missed regularly, for example).
I don't know if this is your problem, but maybe it will help...
- Mike
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