This was my solution for my 1225dx!! thank you!! Now I have Headphones and mic working.

Quote Originally Posted by Applelnx View Post
The problem seems to be solved for me. I reinstalled ALSA and PULSEAUDIO, edited /etc/modprobe.d/alsa-base.conf and added the following line at the bottom:

Code:
options snd-hda-intel model=dell-m4-1
Then, reloaded ALSA, and typed the following in a terminal:

Code:
killall pulseaudio
sudo alsa force-reload
pulseaudio -D
Everything works fine for me now (internal and external microphone,speakers and headphones).