I have a laptop Packard Bell Easynote ML65 series, with a Realtek ALC272 codec, running Intrepid.
Sound problem was:
headphones: OK
laptop-speakers: no sound at all
End 2008 I ran AlsaUpgrade-1.0.x-rev-1.15.sh, wich did not solve my problem.
Ref: http://ubuntuforums.org/showthread.p...ALC272&page=14 look at #133


Yesterday I did run AlsaUpgrade-1.0.x-rev-1.16.sh, and:
Sound: headphones: OK
laptop-speakers: wonderfull sound
Headphone-switch does mute the speakers.

Here is how I did it:
Download en extract the upgrade script.
$ sudo ./AlsaUpgrade-1.0.x-rev-1.16.sh -d
$ sudo ./AlsaUpgrade-1.0.x-rev-1.16.sh -snap

System -> Preferences -> Sound
Set "Default mixer tracks" to Device: "HDA Intel (Alsa Mixer)"
Set the other controls to "ALSA - Advanced Linux Sound Architecture"

Double click the speaker icon on the top panel.
Make shure the device is "HDA Intel (Alsa Mixer)"
Set Master, PCM and Front on Max. volume
Select Switches: Headphone: On

Soundcheck, thank you for your script, you made my life more "soundfull".
If one day you should come to Antwerp I buy you a couple of the best Belgian beers.