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Date:      Fri, 07 Jun 2002 10:35:05 -0700
From:      Lars Eggert <larse@ISI.EDU>
To:        frank@exit.com
Cc:        stable@FreeBSD.ORG, hackers@FreeBSD.ORG
Subject:   Re: Numerous hard hangs on TWO different ASUS P4T-E w/P4 1.6G
Message-ID:  <3D00EEC9.50009@isi.edu>
References:  <200206071657.g57Gvc2J003748@realtime.exit.com>
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[-- Attachment #1 --]
Frank Mayhar wrote:
>>I've seen these, too, on a dual-P3 Dell Precision 420. Under high loads 
>>(buildworld), I get the exact same short-time freezes that sometimes 
>>recover, and sometimes lockup the machine solid.
>>
>>We have the same sound card (and network card), and in my case, not 
>>playing audio during high loads solves the problem - are you using your 
>>audio device at all when this happens?
> 
> Nope.  Well, sometimes, but not often.  When I am, I get the "repeating
> the last sample" effect during the freeze, the same as if the sound card
> wasn't generating interrupts (or the system wasn't servicing those
> interrupts).  This is one of the things that makes me suspect interrupt
> problems.

I get the "repeating last sample" also (good way to describe it).

This may be unrelated, but I also found out that the sound driver isn't 
happy when the card shares its IRQ with someone. The Dell Precision has 
an onboard SCSI controller that by default shares an IRQ with the sound 
card. Even with no SCSI disks connected, the sound would be really 
choppy. When I disabled the SCSI controller in the BIOS, those problems 
went away.

Lars
-- 
Lars Eggert <larse@isi.edu>           USC Information Sciences Institute

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