I did a clean install of 12.10. When I open Sound Settings in gnome the only device in the list is "Dummy Output", and sound is not working.
Sound worked fine out of the box in 12.04.
I ran alsamixer, it says my card is "HDA Intel", and chip is "Realtek ALC880". The alsamixer playback output was set to mute at first, unmuting did not fix.
I checked out the info at unixmen as suggested on a similar question; I've done everything there except installing the ubuntu audio dev team driver. Should I try install this?
Edit:
I've been reading the sound troubleshooting guide.
It looks like Ubuntu is finding my audio device correctly.
mike@wucade:~$ lspci -v | grep -A7 -i "audio"
00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller (rev 03)
Subsystem: Albatron Corp. Device 2668
Flags: bus master, fast devsel, latency 0, IRQ 40
Memory at d01c0000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd-hda-intel
Still stuck as to why this isn't working.
Best Answer
Install
pavucontrol
(as Rinzwind suggested in comments). This can often directly facilitate solving the problem (not just troubleshooting it).For example, I had this issue.
pavucontrol
revealed that my output on the Intel HDA device was disabled, and I was able to enable it.