I installed Ubuntu 12.10 on my Thinkpad T400 ... but I have no sound and the keyboard buttons for volume up and down do nothing. When I open sound settings, there's nothing: it's all greyed out. It is like the driver is missing.

Alsamixer gives :

card :HDA Intel                              

chip: Conexant CX20561 (Hermosa) 

What can I do?

T400:~$ sudo aplay -l

**** Liste des Périphériques Matériels PLAYBACK ****

Home directory /home/louisro not ours.

carte 0: Intel [HDA Intel], périphérique 0: CONEXANT Analog [CONEXANT Analog]

  Sous-périphériques: 1/1

  Sous-périphérique #0: subdevice #0

carte 0: Intel [HDA Intel], périphérique 1: Conexant Digital [Conexant Digital]

  Sous-périphériques: 1/1

  Sous-périphérique #0: subdevice #0

T400:~$ lspci -v | grep -iA 7 'audio'

00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)

Subsystem: Lenovo Device 20f2

Flags: bus master, fast devsel, latency 0, IRQ 49

Memory at fc020000 (64-bit, non-prefetchable) [size=16K]

Capabilities: <access denied>

Kernel driver in use: snd_hda_intel

Kernel modules: snd-hda-intel

In the upper bar the sound icon is not functionning:

The sound works out of the box with a live USB ubuntu with /etc/modprobe.d/alsa-base.conf containing the following:

# autoloader aliases

install sound-slot-0 /sbin/modprobe snd-card-0

install sound-slot-1 /sbin/modprobe snd-card-1

install sound-slot-2 /sbin/modprobe snd-card-2

install sound-slot-3 /sbin/modprobe snd-card-3

install sound-slot-4 /sbin/modprobe snd-card-4

install sound-slot-5 /sbin/modprobe snd-card-5

install sound-slot-6 /sbin/modprobe snd-card-6

install sound-slot-7 /sbin/modprobe snd-card-7



# Cause optional modules to be loaded above generic modules

install snd /sbin/modprobe --ignore-install snd $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-ioctl32 ; /sbin/modprobe --quiet --use-blacklist snd-seq ; }

#

# Workaround at bug #499695 (reverted in Ubuntu see LP #319505)

install snd-pcm /sbin/modprobe --ignore-install snd-pcm $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-pcm-oss ; : ; }

install snd-mixer /sbin/modprobe --ignore-install snd-mixer $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-mixer-oss ; : ; }

install snd-seq /sbin/modprobe --ignore-install snd-seq $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; /sbin/modprobe --quiet --use-blacklist snd-seq-oss ; : ; }

#

install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; : ; }

# Cause optional modules to be loaded above sound card driver modules

install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-emu10k1-synth ; }

install snd-via82xx /sbin/modprobe --ignore-install snd-via82xx $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq ; }



# Load saa7134-alsa instead of saa7134 (which gets dragged in by it anyway)

install saa7134 /sbin/modprobe --ignore-install saa7134 $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist saa7134-alsa ; : ; }

# Prevent abnormal drivers from grabbing index 0

options bt87x index=-2

options cx88_alsa index=-2

options saa7134-alsa index=-2

options snd-atiixp-modem index=-2

options snd-intel8x0m index=-2

options snd-via82xx-modem index=-2

options snd-usb-audio index=-2

options snd-usb-caiaq index=-2

options snd-usb-ua101 index=-2

options snd-usb-us122l index=-2

options snd-usb-usx2y index=-2

# Ubuntu #62691, enable MPU for snd-cmipci

options snd-cmipci mpu_port=0x330 fm_port=0x388

# Keep snd-pcsp from being loaded as first soundcard

options snd-pcsp index=-2

# Keep snd-usb-audio from beeing loaded as first soundcard

options snd-usb-audio index=-2