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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

enter image description here

In the upper bar the sound icon is not functionning: enter image description here

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
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post the output of sudo aplay -l. Please post also the output of: lspci -v | grep -iA 7 'audio' –  phipsalabim Feb 18 '13 at 0:31
just did it. thanks –  louis Feb 18 '13 at 9:36
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2 Answers

Driver is ok.

Open alsamixer, make sure your output channels are not muted. Press the left and right arrow keys, to move to different channels and press m to toggle mute / unmute. A "M/M" at the bottom of a column means it's muted

It should look kinda like this:

alsamixer screenshot

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thanks but I checked and they were not muted...still no sound –  louis Feb 21 '13 at 20:26
try: /usr/bin/amixer -c 0 sset "Auto-Mute Mode" Disabled –  phipsalabim Feb 21 '13 at 20:39
run: gksudo gedit /etc/modprobe.d/alsa-base.conf and add this line options snd-hda-intel model=thinkpad. You will have to reboot. If that doesn't help try resetting your BIOS to factory defaults. –  phipsalabim Feb 21 '13 at 21:05
I did the auto-mute command and added the line in the alas-base.conf file, still no sound ! I also reset the bios to factory settings ...still nothing, any other ideas? –  louis Feb 21 '13 at 23:16
Full disclosure: I'm stumbling in the dark. Please try changing the line in the conf file to option snd-hda-intel model=generic, reboot. –  phipsalabim Feb 21 '13 at 23:25
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up vote 0 down vote accepted

My /home is mounted from a separate partition, and this partition was ntfs, so there was permissions problems...Now I formatted this partition to ext4....and the sound works!

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