I have a very similar problem after a fresh install of osuse 11.0.
My toshiba satellite, sound is fine, but headphones dont seem to work at all.
Upon going for help trying to update alsa drivers, the following rpm install cmd is not very simple:
zypper ar
Index of /repositories/multimedia:/libs/openSUSE_11.0
i guess it requires the particular rpm , and not the path only???
Any clue?