View Full Version : [ubuntu] 9.10 Absence of Sound

March 18th, 2010, 01:12 PM
(Originally posted in "Absolute Beginners")

I have installed Karmic on a desktop and a laptop. The desktop has a sound card (Ensoniq) and speakers, while the laptop has only the integrated sound controller and the PC speakers. The desktop has full (and wonderful) sound, but the laptop is silent.

The laptop has sound on Windows and SUSE 11.2. After researching, I followed the article http://drowninginbugs.blogspot.com/2...io-in-910.html (http://drowninginbugs.blogspot.com/2009/10/caveats-for-audio-in-910.html) and the thread http://ubuntuforums.org/showthread.php?t=1307019 without success. After further reading, I am of the impression that the PC speaker sound does not function under Karmic, and the resolution is sometime in the future.

Is this a fair statement for PC speaker sound ? This cannot be resolved by adding a sound card, as the laptop has an integrated sound controller for the PC speaker(s) as well as the external jacks (mic, headphones and external speaker(s)). I can wait for sound, though I do not wish to spend time now on a problem that cannot be resolved.

(Originally posted in "Absolute Beginners")

March 23rd, 2010, 05:40 PM
Apologies for replying to myself ..... ;)

After much thrashing and debugging, through the "Pulseaudio", the "backports", and much testing, the resolution is so simple that it is almost embarassing.

The Intel onboard Internal Audio controller must be specified as "no amplifier". In the Pulseaudio "Volume Control", I set the output port to "Analog output, no amplifier" and (Voila ?) sound!!!!! :D :D :D

At one stage, I booted from the LiveCD, with no sound to be found. After setting to "No amplifier, the sound appeared.


sean@UbLinux:~$ lspci | grep -i audio
00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03)
sean@UbLinux:~$ cat /proc/asound/cards
0 [I82801DBICH4 ]: ICH4 - Intel 82801DB-ICH4
Intel 82801DB-ICH4 with Cx20468-31 at irq 17
sean@UbLinux:~$ fuser -v /dev/dsp* /dev/snd/*
/dev/snd/controlC0: sean 1679 F.... pulseaudio
/dev/snd/pcmC0D0c: sean 1679 F...m pulseaudio
/dev/snd/pcmC0D0p: sean 1679 F...m pulseaudio
sean@UbLinux:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: I82801DBICH4 [Intel 82801DB-ICH4], device 0: Intel ICH [Intel 82801DB-ICH4]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: I82801DBICH4 [Intel 82801DB-ICH4], device 4: Intel ICH - IEC958 [Intel 82801DB-ICH4 - IEC958]
Subdevices: 1/1
Subdevice #0: subdevice #0