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 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs