Problemas con el sonido en toshiba satellite

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Hola! Tengo un pequeño problema con el sonido y mi portátil. Probé a instalarle Ubuntu 10.04 y no conseguí que el sonido sonase solo por los auriculares al conectarlos así que decidí actualizar, el caso es que al parecer ha actualizado a la versión alfa 12.04 y ahora no hay forma de hacer que el portátil haga ningín tipo de ruido.
He probado varias soluciones de otros post del foro y nada, ya no se que mas probar.

La información de mi sistema es la siguiente:

Versión de ubuntu: DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu precise (development branch)"

Versión del núcleo: 3.2.0-4-generic-pae

Información del alsaMixer:
Versión del driver ALSA: 1.0.24
Tarjeta: HDA Intel PCH
Chipset: Conexant CX20585 (esto último es curioso, por que en Ubuntu 10.04 me decia que era Conexant 5069)

lsmod:

Module Size Used by
bnep 17830 2
rfcomm 38140 10
parport_pc 32114 0
ppdev 12849 0
vesafb 13489 1
binfmt_misc 17292 1
joydev 17393 0
snd_hda_codec_hdmi 31769 4
nvidia 10586487 41
uvcvideo 67205 0
videodev 86588 1 uvcvideo
toshiba_acpi 17930 0
sparse_keymap 13658 1 toshiba_acpi
arc4 12473 2
video 18908 0
snd_hda_codec_conexant 52443 1
toshiba_bluetooth 12711 0
wmi 18744 0
snd_seq_midi 13132 0
snd_rawmidi 25187 1 snd_seq_midi
snd_hda_intel 32765 6
snd_hda_codec 104211 3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
snd_hwdep 13276 1 snd_hda_codec
snd_seq_midi_event 14475 1 snd_seq_midi
ath9k 117326 0
mac80211 432587 1 ath9k
snd_pcm 80845 4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
ath9k_common 13781 1 ath9k
ath9k_hw 391400 2 ath9k,ath9k_common
ath 19387 3 ath9k,ath9k_common,ath9k_hw
snd_seq 51567 2 snd_seq_midi,snd_seq_midi_event
snd_seq_device 14172 3 snd_seq_midi,snd_rawmidi,snd_seq
btusb 17912 2
bluetooth 158470 23 bnep,rfcomm,btusb
psmouse 72846 0
serio_raw 13027 0
cfg80211 178699 3 ath9k,mac80211,ath
snd_timer 28932 2 snd_pcm,snd_seq
mei 36570 0
snd 55991 21 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_rawmidi,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_seq,snd_seq_device,snd_timer
soundcore 12600 1 snd
snd_page_alloc 14108 2 snd_hda_intel,snd_pcm
lp 17455 0
parport 40930 3 parport_pc,ppdev,lp
atl1c 36666 0

lspci:
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b4)
00:1c.5 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 6 (rev b4)
00:1c.6 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 7 (rev b4)
00:1d.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: nVidia Corporation Device 0dec (rev a1)
01:00.1 Audio device: nVidia Corporation GF108 High Definition Audio Controller (rev a1)
08:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
09:00.0 Ethernet controller: Atheros Communications AR8152 v2.0 Fast Ethernet (rev c1)

Gracias por adelantado.