In-Reply-To: <20060116155353.GC18972@csclub.uwaterloo.ca>
References: <20060113144529.56fa3166@darjeeling.triplehelix.org> <20060116155353.GC18972@csclub.uwaterloo.ca>
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Cc: Joshua Kwan <joshk@triplehelix.org>, linux-kernel@vger.kernel.org
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From: Kyle Moffett <mrmacman_g4@mac.com>
Subject: Re: [?] PCI BIOS masks some IDs to prevent OS detection?
Date: Mon, 16 Jan 2006 11:15:12 -0500
To: lsorense@csclub.uwaterloo.ca (Lennart Sorensen)
Sender: linux-kernel-owner@vger.kernel.org
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On Jan 16, 2006, at 10:53, Lennart Sorensen wrote:
> Maybe the raid card has a pin shorted to ground, so all reads of  
> that bit read as 0.  That would explain why all the cards lost the  
> same bit. It appears to be the highest bit on the bus that is stuck  
> low.
>
> I see this fairly frequently on our own mainboards due to a problem  
> with the soldering of a surface mount pci bridge chip on the bottom  
> of the board.

I've also seen this problem with a faulty case where a small metal  
support shorted a couple pins on the PCI riser.  It gave odd PCI ids,  
corrupted data, and crashed within a minute of booting.  After  
removing the metal bracket, it's been stable for almost a year.

Cheers,
Kyle Moffett

--
I have yet to see any problem, however complicated, which, when you  
looked at it in the right way, did not become still more complicated.
   -- Poul Anderson


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