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No audio devices in Pulseaudio after upgrading to 12.10

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http://askubuntu.com – I upgraded from Ubuntu 12.04 to 12.10 and after this I have no audio devices in the audio settings panel, but other parts of the system indicate that I do still have audio devices. Eg: aplay -l returns **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 0/1 Subdevice #0: subdevice #0 card 1: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0] Subdevices: 0/1 Subdevice #0: subdevice #0 What can I do to debug this further? All the links I've found such as https://wiki.ubuntu.com/DebuggingSoundProblems don't (HowTos)