15
Jun
14

Linux, Intel HDA, VIA codec and headphones

Yesterday, I finally bothered to get Debian 7 set up on my real machine (with Intel HDA and a VIA VT1705 codec), but I ran into an issue where headphone sensing doesn’t work: audio comes out from the back jack if I don’t have anything plugged to the front jack, but if I do have something plugged to the front jack, neither of them will work.

I tried looking for a solution, but they all relate to systems with Realtek codecs. Here’s what solved it on mine:

  1. Start alsamixer
  2. Scroll all the way to the right
  3. Select the “Smart 5.1” option
  4. Hit . (period) to unmute it

hda_alsamixer

As odd of a name “Smart 5.1” is, enabling it will make headphone sensing work.

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