Quote Originally Posted by pgmac View Post
Hi,
I was having the exact same problem on my Dell Studio 1558 (sound through the speakers, but none when using headphones). After some more google-ing around, I found this doco: https://help.ubuntu.com/community/HdaIntelSoundHowto

I found my card model using this:
Code:
cat /proc/asound/card0/codec#* | grep Codec
which returned:
Code:
Codec: IDT 92HD73C1X5
This file: /usr/share/doc/alsa-base/driver/HD-Audio-Models.txt.gz lists the sound models with available modprobe modules to use.
Code:
zless /usr/share/doc/alsa-base/driver/HD-Audio-Models.txt.gz
The full model number wasn't in there, because the model has been wildcarded. I searched for
Code:
92HD73
In this section there are several PC models listed, find the one that best suites you (I used 'dell-eq').
After a reboot, I had headphone sound again.

Cheers,
Paul
Thanks, this works for my Gateway E-155 too!

These are what my laptop returns:
Codec: SigmaTel STAC9205
Codec: LSI ID 1040

STAC9205/9254
=============
ref Reference board
dell-m42 Dell (unknown)
dell-m43 Dell Precision
dell-m44 Dell Inspiron
eapd Keep EAPD on (e.g. Gateway T1616)
auto BIOS setup (default)

And then I followed Temüjin 's advice,

but replaced dell-eq with eapd. It works great! thanks guys.