Just an additional suggestion that may or may not apply (but I've seen it
before), is the BIOS on the machine current?
Mason
Linux: because a PC is a terrible thing to waste.
----Original Message Follows----
From: Paul M Foster <paulf@quillandmouse.com>
Reply-To: slug@nks.net
To: slug@nks.net
Subject: Re: [SLUG] Why is time slipping?
Date: Fri, 30 Mar 2007 18:47:00 -0400
Ian C. Blenke wrote:
>Eben King wrote:
>>>Oh, I *know* there's something wrong with the machine. Screen savers
>>>move in jumps, performance on everything is way slower than this
>>>CPU/memory combination should warrant.
>>>
>>>No, there's no one process sucking CPU. I checked long ago on this.
>>I'm thinking an OS-level driver has gone crazy, busy-waiting or
>>whatnot. Have you tried booting another kernel (from a rescue disk or
>>whatever)? Do you normally run one of the vendor-supplied "kitchen
>>sink" kernels, or is it one you compiled with just the drivers you
>>need, and most of those modularized? Can you try "rmmod"ing things
>>and see when it stops?
>
>This sounds like a IRQ routing issue. Welcome to the pain of ACPI and/or
>broken a APIC.
>
>Have you tried booting with any of the following kernel options:
>
> acpi=off
> noapic
> nolapic
> irqpoll
>
>Try each one, and in various combinations. I'll wager one of them will
>"fix" the clock problem as well as much of your perceived slowness.
I just wanted to follow up on this o-l-d thread. I eventually got around to
handling this. I added noapic and acpi=off to my grub config file. (Couldn't
find irqpoll or nolapic in current list of kernel params.) The clock began
to run properly (not losing time). And some other performance problems
resolved. The machine still has some odd quirks, but the two main ones
resolved. So, thanks to Ian.
Paul
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