> Which kernel version have you tested? There have been quite a few > development about USB-audio recently, so something might be missing or > conflicting? Let's see. I have just tested d86f43b17ed4cd751f73d890ea63f818ffa5ef3d with and without the patch: - Without the patch, everything works fine. - With the patch, speaker-test times out. I'll try to collect some more infomation from dyndb and try to have a look to see what the problem is. There's no obvious mistakes in the patch as far as I can tell. Olivia