Re: [linux-audio-user] USB 1.1 soundcard

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Subject: Re: [linux-audio-user] USB 1.1 soundcard
From: Karsten Wiese (annabellesgarden_AT_yahoo.de)
Date: Mon Nov 15 2004 - 02:33:34 EET

A no go relating USB 1.1 audio playback is intel's ICH6 (i915 & i925 chipsets) in its first production incarnation.
Marking 82801FB SL7AG.
Thanks to intel's really usefull errata docs, I stopped wondering about the dropouts i got:

<snip>
7. Intel® ICH6 Completion Delays Problem:
 ICH6 internal devices or devices connected to the ICH6 may experience additional completion delays of up to 40 usec.
 Implication: No end user functional impact expected. Most ICH6 devices are buffered adequately to withstand an additional 40 usec delay.
 The UHCI (Full-speed only) may experience underruns and PCI may experience downstream request delays.
     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Both implications are allowable their respective industry specifications.
 Workaround: None.
 Status: Fixed in B-2 stepping.
</snip>

Karsten

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