Аудио-плееры не воспроизводят звук

[root@localhost ~]# uname -a
Linux localhost.localdomain 2.6.38.8-pclos3.bfs #1 SMP PREEMPT Fri Jul 8 18:01:30 CDT 2011 i686 i686 i386 GNU/Linux
[root@localhost ~]# lspci
00:00.0 Memory controller: NVIDIA Corporation CK804 Memory Controller (rev a3)
00:01.0 ISA bridge: NVIDIA Corporation CK804 ISA Bridge (rev a3)
00:01.1 SMBus: NVIDIA Corporation CK804 SMBus (rev a2)
00:02.0 USB controller: NVIDIA Corporation CK804 USB Controller (rev a2)
00:02.1 USB controller: NVIDIA Corporation CK804 USB Controller (rev a3)
00:04.0 Multimedia audio controller: NVIDIA Corporation CK804 AC'97 Audio Controller (rev a2)
00:06.0 IDE interface: NVIDIA Corporation CK804 IDE (rev a2)
00:07.0 IDE interface: NVIDIA Corporation CK804 Serial ATA Controller (rev a3)
00:08.0 IDE interface: NVIDIA Corporation CK804 Serial ATA Controller (rev a3)
00:09.0 PCI bridge: NVIDIA Corporation CK804 PCI Bridge (rev a2)
00:0a.0 Bridge: NVIDIA Corporation CK804 Ethernet Controller (rev a3)
00:0b.0 PCI bridge: NVIDIA Corporation CK804 PCIE Bridge (rev a3)
00:0c.0 PCI bridge: NVIDIA Corporation CK804 PCIE Bridge (rev a3)
00:0d.0 PCI bridge: NVIDIA Corporation CK804 PCIE Bridge (rev a3)
00:0e.0 PCI bridge: NVIDIA Corporation CK804 PCIE Bridge (rev a3)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
05:00.0 VGA compatible controller: NVIDIA Corporation GT215 [GeForce GT 240] (rev a2)
05:00.1 Audio device: NVIDIA Corporation High Definition Audio Controller (rev a1)
[root@localhost ~]# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 003: ID 0ac8:3420 Z-Star Microelectronics Corp. Venus USB2.0 Camera
Bus 002 Device 002: ID 09da:000a A4 Tech Co., Ltd Optical Mouse Opto 510D
[root@localhost ~]#

# lsmod | grep snd

$ ls -lR /dev/snd

# lsmod | grep snd
snd_usb_audio          70631  2
snd_hda_codec_hdmi     20480  4
snd_hda_intel          19109  2
snd_intel8x0           22574  2
snd_ac97_codec         90143  1 snd_intel8x0
ac97_bus                 850  1 snd_ac97_codec
snd_hda_codec          66310  2 snd_hda_codec_hdmi,snd_hda_intel
snd_seq_dummy           1135  0
snd_seq_oss            25264  0
snd_seq_midi_event      4648  1 snd_seq_oss
snd_seq                42136  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_pcm_oss            33854  0
snd_pcm                60446  7 snd_usb_audio,snd_hda_codec_hdmi,snd_hda_intel,snd_intel8x0,snd_ac97_codec,snd_hda_codec,snd_pcm_oss
snd_hwdep               4820  2 snd_usb_audio,snd_hda_codec
snd_usbmidi_lib        15440  1 snd_usb_audio
snd_timer              15383  2 snd_seq,snd_pcm
snd_rawmidi            15287  1 snd_usbmidi_lib
snd_mixer_oss          12981  1 snd_pcm_oss
snd_seq_device          4457  4 snd_seq_dummy,snd_seq_oss,snd_seq,snd_rawmidi
snd                    43189  28 snd_usb_audio,snd_hda_codec_hdmi,snd_hda_intel,snd_intel8x0,snd_ac97_codec,snd_hda_codec,snd_seq_oss,snd_seq,snd_pcm_oss,snd_hwdep,snd_pcm,snd_usbmidi_lib,snd_timer,snd_mixer_oss,snd_rawmidi,snd_seq_device
soundcore               5025  1 snd
snd_page_alloc          5877  3 snd_hda_intel,snd_intel8x0,snd_pcm
usbcore               117639  8 snd_usb_audio,uvcvideo,snd_usbmidi_lib,uhci_hcd,ohci_hcd,ehci_hcd,usbhid

$ ls -lR /dev/snd
/dev/snd:
итого 0
drwxr-xr-x  2 root root       60 Май 10 08:24 by-id/
drwxr-xr-x  2 root root      100 Май 10 08:24 by-path/
crw-rw----+ 1 root audio 116,  6 Май 10 08:24 controlC0
crw-rw----+ 1 root audio 116, 15 Май 10 08:24 controlC1
crw-rw----+ 1 root audio 116, 17 Май 10 08:24 controlC2
crw-rw----+ 1 root audio 116, 14 Май 10 08:24 hwC1D0
crw-rw----+ 1 root audio 116, 13 Май 10 08:24 hwC1D1
crw-rw----+ 1 root audio 116, 12 Май 10 08:24 hwC1D2
crw-rw----+ 1 root audio 116, 11 Май 10 08:24 hwC1D3
crw-rw----+ 1 root audio 116,  5 Май 10 08:24 pcmC0D0c
crw-rw----+ 1 root audio 116,  4 Май 10 08:24 pcmC0D0p
crw-rw----+ 1 root audio 116,  3 Май 10 08:24 pcmC0D1c
crw-rw----+ 1 root audio 116,  2 Май 10 08:24 pcmC0D2p
crw-rw----+ 1 root audio 116, 10 Май 10 08:24 pcmC1D3p
crw-rw----+ 1 root audio 116,  9 Май 10 08:24 pcmC1D7p
crw-rw----+ 1 root audio 116,  8 Май 10 08:24 pcmC1D8p
crw-rw----+ 1 root audio 116,  7 Май 10 08:24 pcmC1D9p
crw-rw----+ 1 root audio 116, 16 Май 10 08:24 pcmC2D0c
crw-rw----+ 1 root audio 116,  1 Май 10 08:24 seq
crw-rw----+ 1 root audio 116, 33 Май 10 08:24 timer
/dev/snd/by-id:
итого 0
lrwxrwxrwx 1 root root 12 Май 10 08:24 usb-Vimicro_Corp._Venus_USB2.0_Camera-02 -> ../controlC2
/dev/snd/by-path:
итого 0
lrwxrwxrwx 1 root root 12 Май 10 08:24 pci-0000:00:02.1-usb-0:9:1.2 -> ../controlC2
lrwxrwxrwx 1 root root 12 Май 10 08:24 pci-0000:00:04.0 -> ../controlC0
lrwxrwxrwx 1 root root 12 Май 10 08:24 pci-0000:05:00.1 -> ../controlC1