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From: Nikos Chantziaras <realnc@arcor.de>
Subject: [gentoo-user] Re: Which sound codecs do I need?
Date: Thu, 13 Oct 2011 04:58:24 +0300
Organization: Lucas Barks
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On 10/13/2011 02:35 AM, Walter Dnes wrote:
> I'm installing Gentoo on an older Intel Core2 Duo machine from Dell
> for some testing.  Checking with "lspci -v" from the install CD shows...
>
> 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
>       Subsystem: Dell Inspiron 530

Well, since you're too busy to use Google, let me do that for you ;-)

http://support.dell.com/support/edocs/systems/inspd530/en/OM/HTML/appendix.htm

The sound chip is a Realtek ALC888.  I'm sure this is all the info 
needed to select the correct driver.