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Ubuntu 13.10 installed fresh (not upgraded) on an Intense PC (Analog and S/PDIF share same jack)

Analog audio output used to work just fine, but now does not appear in sound settings anymore; only "Digital Output (S/PDIF) Built-in Audio" is shown. I never used S/PDIF output; maybe it works, but it's currently useless for me - If I choose it, nothing goes to the speakers.

aplay -L shows

default
    Playback/recording through the PulseAudio sound server
sysdefault:CARD=PCH
    HDA Intel PCH, ALC888 Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC888 Analog
    Front speakers
(...)

playing to these devices with aplay -D <device> /usr/share/sounds/alsa/Front_Center.wav:

  • "default" - everything is silent.
  • "sysdefault" - sound plays to the speakers normally (HW is OK!).
  • For any other device I get an error

    aplay: set_params:1239: Channels count non available 
    

I've found a partial workaround: I installed pavucontrol, and from its configuration tab I can choose "Analog Stereo Sutput" and then all applications play audio normally (including aplay to "default"). But, there is still no "analog output" option in the system settings (only S/PDIF), and no audio control in the menu bar; I have to do everything from pavucontrol.

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