This is related to No sound after 14.10 -> 15.04 -> 15.10 upgrade

After the upgrade, there is no sound over the headphones. I can use the same solution in the linked question (in pavucontrol, select "Analog Stereo Output (unplugged)", I also need to select "Headphones (unplugged)" in the "Output Devices" tab, because by default it's Line in). The problem is every time I lock the screen, when I unlock it I need to do these same steps, since it reverts to "Digital Stereo (HDMI) Output".

Something I noticed is that, if I insert the headphones halfway into the jack, the "Analog Stereo Output" (i.e. plugged) appears in the list, but it disappears after I fully insert it. The headphones are working fine, and this didn't happen in 14.04. So, my question is how to either:

  • Fix this; or
  • Disable jack detection (I only listen using the headphones); or
  • Force the selection of "Analog Stereo Output (unplugged)"

        $ aplay -l
    **** List of PLAYBACK Hardware Devices ****
    card 0: PCH [HDA Intel PCH], device 0: VT1705 Analog [VT1705 Analog]
      Subdevices: 0/1
      Subdevice #0: subdevice #0
    card 0: PCH [HDA Intel PCH], device 1: VT1705 Digital [VT1705 Digital]
      Subdevices: 1/1
      Subdevice #0: subdevice #0
    card 0: PCH [HDA Intel PCH], device 2: VT1705 Alt Analog [VT1705 Alt Analog]
      Subdevices: 1/1
      Subdevice #0: subdevice #0
    card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
      Subdevices: 1/1
      Subdevice #0: subdevice #0
  • Small update: I've disabled HDMI audio in the BIOS and now it keeps the Audio Stereo Output selected when unlocking the desktop. I still need to change it everytime I boot, but it's much less annoying. – Conrado Aug 26 '16 at 11:42

I encountered the exact same problem with my stereo plug not being recognized after I changed something with my audio setup but the audio still being output when I selected it manually.

I found my solution in a similar question: I was using the wrong plug on my board. Switching it from the teal-colored rear speakers to "Line Out" (green) now properly makes pulseaudio detect my device and I don't need to disable HDMI output every time the monitor comes back from standby.

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