Hmmm… Ok, … so we may need to go beyond just some simple edit to /etc/modprobe.d/sound file, and either create another fix by itself, or apply one of the edit with another fix.
There is a massive thread on notebookreview.com forum on your laptop model, most of which is Ubuntu users, but there may be useful tidbits there:
~~ Dell XPS M1330 Linux Users ~~ - Notebook Forums and Laptop Discussion](http://forum.notebookreview.com/showthread.php?t=153973)
When reading Ubuntu threads, my experience one has to be very careful, as often there are suggestions, most of which don’t work (sadly, sort of the way this thread is heading ). Also, when Ubuntu users refer to the /etc/modprobe.d/alsa-base file, the openSUSE approximate equivalent is an /etc/modprobe.d/sound file, although the openSUSE and Ubuntu philosophy’s as to what goes in that file is different in many respects.
For example, in one case, they reference a ubuntu user who got sound working: InstallingUbuntuOnADellXPSM1330 - Ubuntu Wiki
they managed to use the line:
options snd-hda-intel model=3stack
They noted getting the mixer right was important (ie unmute FRONT in addition to unmuting PCM).
Here is an example where a slackware user:
http://intr.overt.org/blog/?page_id=56
they had to use the line:
options snd-hda-intel model=5stack
They also referred to a patch in 1.0.14 of alsa. But you have 1.0.16 so it should include the patch.
In another post, on 01-12-2008, 03:26 AM , a user notes:
I just found a solution for the integrated speakers. In GNOME just go to your “Volume Control” => “Switches” and tick “Line In as Output”. Voila.
so again, you need to check your mixer. That may or may not be with the 3stack option.
If one searches on the alsa site for the Dell 1330 one gets this hit:
Search results for 1330 - AlsaProject
so it does indicate alsa driver support.
Your dell has a stack9228, and a search for 9228 gives this:
Search results for 9228 - AlsaProject and those fixes are in your alsa version.
A more generic search for a stac92xx give:
Search results for stac92xx - AlsaProject and those fixes are in your alsa version.
A more general search for a stac9200 yields this
Search results for stac9200 - AlsaProject
and there has been only one update to alsa since your 1.0.16, and that was not for your model laptop.
So I think this should be able to work with your model laptop.
Please try those model options again, restarting alsa as noted after each edit, and then very carefully check your mixer. Note the suggestions above re: “Front” and also “line in”.