Comment 11 for bug 45246

I had the same problem after upgrading Breezy to Dapper RC, but not on a ThinkPad--instead on a frankenbuild Athlon XP 2200+ desktop. In my case, in alsamixer there were four identical entries labeled VIA DXS all the way to the right of the mixer console. These were all turned down to zero. I turned them up to 81 and then I got sound from speaker-test, KDE, etc.

amixer info:
Card default 'V8235'/'VIA 8235 with ALC101 at 0xe800, irq 201'
  Mixer name : 'Realtek ALC101'
  Components : 'AC97a:414c4730'
  Controls : 30
  Simple ctrls : 23