[BUG] Clock always faster

[Leon]

"Lamont R. Peterson" <lamont at gurulabs.com> writes:

> On Friday 05 May 2006 08:24am, Joe Desbonnet wrote:
>> If a clock is found to be running predictibly fast or slow is it
>> possible to correct that somehow?
>
> Run ntpd.  That will keep the system clock in sync.
>
> It could be a bug in the BIOS.  I recently dealt with some AMD64 X2 boxes 
> (from Alienware) that had a really big issue similar to this because of the 
> way the BIOS was configuring (or not properly configuring) the APIC.  If we 
> ran an SMP kernel on those boxes under those conditions, the delay loop was 
> seriously miscalibrated and we would see the clock stall & jump.  It also 
> made it extremely difficult to type as the briefest of touches to a key would 
> cause anywhere from 2-20 keypresses to register, even after we had turned the 
> keyboard repeat rates all the way down.
>
> Running a uniprocessor kernel cured all our woes.  A little more testing 
> pointed towards the APIC config, but the BIOS those boxes had didn't give us 
> enough control to be 100% certain about that.  Unfortunately, we were running 
> in an isolated environment, so we couldn't check for nor try to pick up an 
> updated BIOS for those boxes.

I'm getting this in a laptop with one processor.

>
> [snip]
> -- 
> Lamont R. Peterson <lamont at gurulabs.com>
> Senior Instructor
> Guru Labs, L.C. [ http://www.GuruLabs.com/ ]
> GPG Key fingerprint: F98C E31A 5C4C 834A BCAB  8CB3 F980 6C97 DC0D D409

-- 
Leon