lspci
ṕoste a saída desse coamdno para sabermos qual a sua placa de som.
simone@simone-souza:~$ lspci
00:00.0 Host bridge: Intel Corporation Device 0104 (rev 09)
00:01.0 PCI bridge: Intel Corporation Sandy Bridge PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Sandy Bridge Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation Device 1e3a (rev 04)
00:1a.0 USB Controller: Intel Corporation Device 1e2d (rev 04)
00:1b.0 Audio device: Intel Corporation Device 1e20 (rev 04)
00:1c.0 PCI bridge: Intel Corporation Device 1e10 (rev c4)
00:1c.3 PCI bridge: Intel Corporation Device 1e16 (rev c4)
00:1d.0 USB Controller: Intel Corporation Device 1e26 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Device 1e5f (rev 04)
00:1f.2 SATA controller: Intel Corporation Device 1e03 (rev 04)
00:1f.3 SMBus: Intel Corporation Device 1e22 (rev 04)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 07)
simone@simone-souza:~$