I installed the 12.10 yesterday and like 12.04 there was no sound, I have an ACER 4830 TG. I noticed that the HDMI output is working fine, but Speaker or Headphone isn't working.
So I did the following:
sudo add-apt-repository ppa:ubuntu-audio-dev sudo apt-get update sudo apt-get dist-upgrade
and still couldn't get the sound.
Then I found the temp fix for this issue which is to Suspend the machine completely and resume. However, after restart the same thing happens.
Is there a solution to this issue?