Comment 13 for bug 775788

Ref. #7 https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/775788/comments/7

Please note I don't have Ubuntu running on my 522 but I have the same "Codec" or sound card model = Conexant CX20584. When I set the sound card model to be dell-vostro I have working jack sensing. I have not tried the mic thought.

Try this:

Add "options snd-hda-intel model=dell-vostro" into alsa configuration file. "sudo gedit /etc/modprobe.d/alsa-base.conf"

Then reboot.

Check your pulse audio settings with "pavucontrol" command. There are two sound cards on this machine, the hdmi output and the regular sound card, obviously you need to enable the correct card if you don't have sound at first.

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If this does not work for you, you might try one of the other models related to "Conexant 5066" (source http://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio-Models.txt).

Conexant 5066
=============
  laptop Basic Laptop config (default)
  hp-laptop HP laptops, e g G60
  asus Asus K52JU, Lenovo G560
  dell-laptop Dell laptops
  dell-vostro Dell Vostro
  olpc-xo-1_5 OLPC XO 1.5
  ideapad Lenovo IdeaPad U150
  thinkpad Lenovo Thinkpad

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For any one else finding this post, the above applies if you got the CX20584 card:
cat /proc/asound/card1/codec#0 | grep Codec