I have exactly the same problem (among others ...) in a Compaq Presario V6024EA with an NVIDIA MCP51 audio controler. I get the sound from the internal speakers, but not from the headphone output :(
-- No headphone support for MCP51 https://launchpad.net/bugs/57294 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
