I am running ubuntu 10.10 on a Lenovo ideapad z560. The speakers run fine but the headphones are not recognized when i plug them in. Audio comes out of the speakers only. I tried all alsa and pulseaudio settings but to no avail. I came to know that this is a known bug and many people are having this problem. I was wondering whether shifting to OSS4 would help. I need some advice because once i make the switch i would need to reconfigure a large number of audio apps. Thanks in advance
I would advise that you leave your sound servers alone, maybe you should try if a USB based headphone will help work around the problem until the bug is fixed, also make sure that it is really not a hardware issue, I had an old Dell Inspiron that had a similar problem and it turned out that the problem was hardware failure, Windows that came on it with the proper drivers had the same problem.
Have you tried to explicitly set the sound card's model in the
alsa-base.conf
file?