Ivy bridge - не работает звук

lsmod | grep snd

~$ lsmod | grep snd
snd_hda_codec_hdmi     32474  4 
snd_hda_codec_realtek   224066  1 
snd_hda_intel          33773  5 
snd_hda_codec         127706  3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
snd_hwdep              13668  1 snd_hda_codec
snd_pcm                97188  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_seq_midi           13324  0 
snd_rawmidi            30748  1 snd_seq_midi
snd_seq_midi_event     14899  1 snd_seq_midi
snd_seq                61896  2 snd_seq_midi,snd_seq_midi_event
snd_timer              29990  2 snd_pcm,snd_seq
snd_seq_device         14540  3 snd_seq_midi,snd_rawmidi,snd_seq
snd                    78855  20 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore              15091  1 snd
snd_page_alloc         18529  2 snd_hda_intel,snd_pcm

$ cat /proc/asound/cards 
 0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf7400000 irq 52
 1 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xf7080000 irq 17

~$ ls -l /dev/snd/*
crw-rw---T 1 root audio 116,  7 Sep  4 15:29 /dev/snd/controlC0
crw-rw---T 1 root audio 116, 16 Sep  4 15:29 /dev/snd/controlC1
crw-rw---T 1 root audio 116,  6 Sep  4 15:29 /dev/snd/hwC0D0
crw-rw---T 1 root audio 116, 15 Sep  4 15:29 /dev/snd/hwC1D0
crw-rw---T 1 root audio 116, 14 Sep  4 15:29 /dev/snd/hwC1D1
crw-rw---T 1 root audio 116, 13 Sep  4 15:29 /dev/snd/hwC1D2
crw-rw---T 1 root audio 116, 12 Sep  4 15:29 /dev/snd/hwC1D3
crw-rw---T 1 root audio 116,  5 Sep  4 15:29 /dev/snd/pcmC0D0c
crw-rw---T 1 root audio 116,  4 Sep  4 15:29 /dev/snd/pcmC0D0p
crw-rw---T 1 root audio 116,  3 Sep  4 15:29 /dev/snd/pcmC0D1p
crw-rw---T 1 root audio 116,  2 Sep  4 15:29 /dev/snd/pcmC0D2c
crw-rw---T 1 root audio 116, 11 Sep  4 15:29 /dev/snd/pcmC1D3p
crw-rw---T 1 root audio 116, 10 Sep  4 15:29 /dev/snd/pcmC1D7p
crw-rw---T 1 root audio 116,  9 Sep  4 15:29 /dev/snd/pcmC1D8p
crw-rw---T 1 root audio 116,  8 Sep  4 15:29 /dev/snd/pcmC1D9p
crw-rw---T 1 root audio 116,  1 Sep  4 15:29 /dev/snd/seq
crw-rw---T 1 root audio 116, 33 Sep  4 15:29 /dev/snd/timer

$strace alsamixer

open("/dev/snd/controlC0", O_RDONLY|O_CLOEXEC) = -1 EACCES (Permission denied)
open("/dev/aloadC0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2570, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f231d7a6000
read(3, "# Locale name alias data base.\n#"..., 4096) = 2570
read(3, "", 4096)                       = 0
close(3)                                = 0
munmap(0x7f231d7a6000, 4096)            = 0
open("/usr/share/locale/en_US/LC_MESSAGES/alsa-utils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en/LC_MESSAGES/alsa-utils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale-langpack/en_US/LC_MESSAGES/alsa-utils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale-langpack/en/LC_MESSAGES/alsa-utils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale-langpack/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale-langpack/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
write(2, "cannot open mixer: No such file "..., 45cannot open mixer: No such file or directory