[Bug 381297] Re: Codec: VIA VIA VT1708B 8-Ch - VT1708B Analog audio device - Audio device: nVidia Corporation MCP67 High Definition Audio (rev a1) - working via speakers but not via headphone jack on Asus M2N-CM DVI motherboard in Ubuntu 9.04

[Raymond]

it is because you turn on "Independent HP"

when "Independent HP" is off,  audio through hw:0,0,0 go to both speaker and headphone
and when "Independent HP" is on, audio through hw:0,0,0 goto speaker and audio through hw:0,0,1 go to headphone


Simple mixer control 'Independent HP',0
  Capabilities: enum
  Items: 'OFF' 'ON'
  Item0: 'ON'

**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: VT1708B Analog [VT1708B Analog]
  Subdevices: 1/2
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1

-- 
Codec: VIA VIA VT1708B 8-Ch - VT1708B Analog audio device - Audio device: nVidia Corporation MCP67 High Definition Audio (rev a1) - working via speakers but not via headphone jack on Asus M2N-CM DVI motherboard in Ubuntu 9.04
https://bugs.launchpad.net/bugs/381297
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