Headphones are too quiet with default configuration. Also, the "master" volume doesn't control the headphone volume when it's > 50%, though taking the master volume below 50% also decreases the headphone volume. alsamixer shows there are both "headphone" and "pcm" volume controls for this onboard card, and those are set at about 75%. Making either of those two higher makes the headphones louder.
Uh. those percentages are not really hard data. What are the dB levels at those points you describe? Weird driver you have there... Could you please follow these recommendations: https://www.redhat.com/archives/fedora-devel-list/2009-April/msg02321.html i.e. ry to find the minimal alsa mixer changes necessary that make your playback work at a good level and provide amixer -c0 output before and after that?
This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle. Changing version to '11'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Closing due to lack of response to needinfo request.