no stereo from line-in

Mon May 17 11:53:30 PDT 2004

I need to record sound from LineIn, and I can't get stereo sound; no matter what I do, sound comes out as mono. I'm running gentoo, kernel 2.4.22 (vanilla) and my sound card is an Audigy2. I had an Ensoniq 5880 - different card, same problem.
Couldn't get help from the gentoo list, maybe my problem is hardware related, of the kind that only happens to very unlucky people. And the linux-sound list seems to be dead...
Any idea, any similar experience, anyone?
TIA.
-- 
Jorge Almeida