オーディオ端子を調べる

yamato@yamato-G31T-M:~$ lspci | grep Audio
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 01)
01:00.1 Audio device: ATI Technologies Inc Manhattan HDMI Audio [Mobility Radeon HD 5000 Series]

ディバイスは以下の2つのようだ
Intel Corporation N10/ICH 7 Family High Definition Audio
ATI Technologies Inc Manhattan HDMI Audio [Mobility Radeon HD 5000 Series]