Hi,
i have the same notebook, the same suse version and the same problem too.
I tried updating alsa drivers, libs and everything else...nothing. I added with yast the option "model" to "dell-3stack" but nothing happened.
I keep hearing sounds if I connect the headphones, but nothings comes out if i try with the internal speakers.
Furthermore, when I updated the alsa drivers I started to get an error message about DBus not available when I start banshee. Despite that, banshee works as usual (headphones yes, internal speakers no)
Help me please
Robby
PS
I'm quite a newbie