Left = Mic ; Mid = Headphone ; Right = Headphone

0.  With nothing connected to the front:

$ sudo hda-jack-sense-test -a
Sigmatel specific "Power-Map: 0x00" verb ignored for the moment
Sigmatel specific "Analog Loopback: 0x00" verb ignored for the moment
Pin 0x0a (Not connected): present = No
Pin 0x0b (Black Mic): present = No
Pin 0x0c (Not connected): present = No
Pin 0x0d (Internal Speaker): present = No
Pin 0x0e (Not connected): present = No
Pin 0x0f (Green Line Out): present = No
Pin 0x14 (Not connected): present = No
Pin 0x18 (Internal Mic): present = No
Pin 0x19 (Not connected): present = No
Pin 0x1e (Black SPDIF Out): present = No
Pin 0x1f (Not connected): present = No
Pin 0x20 (Not connected): present = No

1.  With a connection on the Right (mic):

$ sudo hda-jack-sense-test -a
Sigmatel specific "Power-Map: 0x00" verb ignored for the moment
Sigmatel specific "Analog Loopback: 0x00" verb ignored for the moment
Pin 0x0a (Not connected): present = No
Pin 0x0b (Black Mic): present = Yes
Pin 0x0c (Not connected): present = No
Pin 0x0d (Internal Speaker): present = No
Pin 0x0e (Not connected): present = No
Pin 0x0f (Green Line Out): present = No
Pin 0x14 (Not connected): present = No
Pin 0x18 (Internal Mic): present = No
Pin 0x19 (Not connected): present = No
Pin 0x1e (Black SPDIF Out): present = No
Pin 0x1f (Not connected): present = No
Pin 0x20 (Not connected): present = No

2.  With a connection to the Middle jack (headphones):

$ sudo hda-jack-sense-test -a
Sigmatel specific "Power-Map: 0x00" verb ignored for the moment
Sigmatel specific "Analog Loopback: 0x00" verb ignored for the moment
Pin 0x0a (Not connected): present = No
Pin 0x0b (Black Mic): present = No
Pin 0x0c (Not connected): present = No
Pin 0x0d (Internal Speaker): present = No
Pin 0x0e (Not connected): present = No
Pin 0x0f (Green Line Out): present = Yes
Pin 0x14 (Not connected): present = No
Pin 0x18 (Internal Mic): present = No
Pin 0x19 (Not connected): present = No
Pin 0x1e (Black SPDIF Out): present = No
Pin 0x1f (Not connected): present = No
Pin 0x20 (Not connected): present = No

3.  With a connection to the Right (headphone):

$ sudo hda-jack-sense-test -a
Sigmatel specific "Power-Map: 0x00" verb ignored for the moment
Sigmatel specific "Analog Loopback: 0x00" verb ignored for the moment
Pin 0x0a (Not connected): present = No
Pin 0x0b (Black Mic): present = No
Pin 0x0c (Not connected): present = No
Pin 0x0d (Internal Speaker): present = No
Pin 0x0e (Not connected): present = No
Pin 0x0f (Green Line Out): present = Yes
Pin 0x14 (Not connected): present = No
Pin 0x18 (Internal Mic): present = No
Pin 0x19 (Not connected): present = No
Pin 0x1e (Black SPDIF Out): present = No
Pin 0x1f (Not connected): present = No
Pin 0x20 (Not connected): present = No

NOTE: I don't have a S/PDIF cable/connector to try the S/PDIF output.

So ...

Pin 0x0b (Black Mic): present = left jack/connector on the front
Pin 0x0f (Green Line Out): present = middle *and* right jack/connector on the 
front

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https://bugs.launchpad.net/bugs/870360

Title:
  [HP Pavilion dv7 Notebook PC, IDT 92HD75B3X5, Internal] Speakers not
  disabled when headphone jack plugged in

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