On Sat, 5 Jan 2002, Vladimir Dergachev wrote:
> * what hwclock says of cmos clock versus kernel one ?
"hwclock" is accurate (as it can be).
> * what other drivers (like ethernet cards) might be running ?
Not an issue. Bringing up "X" (just the server, no programs, nothing) even
in single-user mode slows my system time clock. I don't even have to have the
VT the server is in active.
> I would guess that what happens is that some driver is disabling
> interrupts for long enough for the kernel to miss the click.
Seems to me that something making me lose 2 seconds per minute (what's
that, 3 interrupts out of every 100Hz jiffy time?) would show up in
other ways, like sluggishness, right? No matter- in single-user I can
start X, take the VT away, and leave the machine idle and my clock
slows.
> in this case it would help if you checked whether your video chip is on
> AGP bus or not.
Nope.
> try using hdparm to simulate lots of pci traffic - does this cause the time
> to slip as well ?
Building a kernel in text-mode doesn't show that (I have explicitly
enabled IDE interupts via "hdparm" in rc.sysinit, as well).
> It could also be that your video card has an interrupt line that is
> assigned (check in BIOS).
It's a laptop- I can't check it in the BIOS, but "/proc/pci" and
"/proc/interrupts" say no.
> Note: if you are not running DRI
Not on this machine.
-Kenny
--
Kenneth R. Crudup Sr. SW Engineer, Scott County Consulting, Washington, D.C.
Home1: PO Box 914 Silver Spring, MD 20910-0914 [EMAIL PROTECTED]
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