I had this problem on a Fujitsu Siemens Amilo computer. I solved the problem by installing the latest Alsa driver (see instructions at https://help.ubuntu.com/community/HdaIntelSoundHowto). Maybe this is unnecessary. Then I used cat /proc/asound/card0/codec\#*|grep Codec with result
and restarting the computer fixes the problem. I found that, finally, the contents of gnome-volume-manager changed and that the headphones were working!
I had this problem on a Fujitsu Siemens Amilo computer. I solved the problem by installing the latest Alsa driver (see instructions at https:/ /help.ubuntu. com/community/ HdaIntelSoundHo wto). Maybe this is unnecessary. Then I used cat /proc/asound/ card0/codec\ #*|grep Codec with result
Codec: Motorola Si3054
Codec: Realtek ALC883
then went to http:// www.mjmwired. net/kernel/ Documentation/ sound/alsa/ ALSA-Configurat ion.txt and searched for ALC883 and found many options. Luckily, someone else tried them for me; and found that adding
options snd-hda-intel model=acer
to the end of the file /etc/modprobe. d/alsa- base
and restarting the computer fixes the problem. I found that, finally, the contents of gnome-volume- manager changed and that the headphones were working!