This happened here too with my "Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)" but it's a bit more complicated.
I added a second (usb) audio device and it showed up in the hardware list, but when I selected it the input and output device lists didn't change (they stayed set as the internal device). So I set the internal one to Off which switched the output device to "Dummy output" but the usb input and output devices still weren't listed. I then removed the usb device and set the internal one back (Analog Stereo Duplex) but the output device still said "Dummy Output". Logging in and out didn't fix this. After reading this bug report, I sent a TERM signal to the pulseaudio daemon and it restarted and now it works fine. I can switch the profile to off and back and it works fine without killing it. And I can also switch to my usb device and back and it works as expected. Seems a bit like pulseaudio wasn't properly responding (fyi, the pulseaudio process was over 10 days old and didn't restart after a login and logout (i.e: the process wasn't killed when I logged out). pulseaudio 1:1.1-0ubuntu15 Distributor ID: Ubuntu Description: Ubuntu 12.04 LTS Release: 12.04 Codename: precise -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/578853 Title: After changing device profile to "Off", it can't be reenabled without restarting pulseaudio To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/578853/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
