Eu tenho o mesmo problema em um Aspire.
O pior é que convenci alguém a usar o Ubuntu! Ovo no meu rosto!
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
$ cat /proc/asound/version
Advanced Linux Sound Architecture Driver Version 1.0.24.
$ head -n 1 /proc/asound/card*/codec#*
==> /proc/asound/card0/codec#0 <==
Codec: Realtek ALC888
==> /proc/asound/card0/codec#1 <==
Codec: LSI ID 1040
==> /proc/asound/card0/codec#2 <==
Codec: Intel Cantiga HDMI
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC888 Analog [ALC888 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: ALC888 Digital [ALC888 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
$ uname -a
Linux salvatore-Aspire-7730 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
O alsa-base.conf
não existe.
Ubuntu 12.04LTS 64 bits
Tentei isto:
sudo apt-get remove --purge alsa-base
sudo apt-get remove --purge pulseaudio
sudo apt-get install alsa-base
sudo apt-get install pulseaudio
sudo alsa force-reload
Então:
sudo apt-get purge pulseaudio gstreamer0.10-pulseaudio
sudo apt-get install pulseaudio gstreamer0.10-pulseaudio indicator-sound
Agora o áudio sai dos fones de ouvido e alto-falante.