Could you please try Ubuntu 6.06 beta 2?
** Changed in: Ubuntu
Sourcepackagename: None => linux-source-2.6.15
** Changed in: linux-source-2.6.15 (Ubuntu)
Status: Unconfirmed => Needs Info
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M-Audio Delta Audiophile 2496 doesn't work properly in Breezy
https://launchpad.net/bugs/30540