On Fri, 4 Jul 2003, Robert Bragg wrote:

> My point was (I still think this is correct) that if his setup is
> resulting in his clock getting out of sync on a daily basis, by 20-30
> minutes then he has bigger problems to think about before he starts 
> playing with ntpd.

True, true.. I stopped using NTPd because of this (it gave up like one
time in a week becuase the lag was too large). I'm back to syncing time
with home-made perl scripts instead.

Although, what to do when it seems it is the system *software* that seems
to mess up time and there seems to be no explanation as to why?

These are the explanations I've heard so far for the lagging time 
behavior:

* It's the power-save functionality of the kernel messing time up (No it 
isn't, problem remains unchanged no matter if APM and APIC is enabled or 
disabled)

* It's a hardware error (no it isn't, since hwclock shows the correct 
time)

* It's a bug in the gnome clock applet (no it isn't, since I run KDE, and 
besides the problem is the same in console mode)

* It's a problem with settings of IDE disks and too aggressive hdparm 
settings, with the result that the system doesn't have the resources left 
to call the clock interrupt often enough (nope, I have a system entirely 
built on SCSI. This one might still be true some similar way though, but I 
don't know how to check it)

* You haven't enabled RTC or RTC isn't readable (It is, I checked. Besides 
VMWare complains loudly if RTC isn't available, and since VMWare keeps 
quiet I think I did right)

If someone else have any theories - no matter how far out, I will even 
check for evil green goblins sitting in the chassis messing with the clock 
chip - I will sure test them. 

  // Joel


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