@sammydlm

So, to simplify everything, here's what you need to do to get your
headphones working:

I recommend you follow the steps from Shang Wu's post above, linked
here: https://bugs.launchpad.net/ubuntu/+bug/184314/comments/6

You could use the patch_via.c that I uploaded, but I think the
alteration from the forum is better, as it seems to me that the
patch_via.c from via-linux-audiopackV1.5.tar.gz is a bit of a nasty hack
and the one on the forums is more elegant.

After you finish with all of that, you will need to type into your
command line "cd /lib/modules/`uname -r`/ubuntu/sound", then "sudo rm -r
alsa-driver".  *This step is important*. You need to get rid of the
conflicting default ubuntu drivers. And you can't keep them around
inside of the /lib/modules/ directories, or they'll continue to
conflict, even if you try to back them up by changing the directory name
as was done in a post above. (though maybe you could move them into your
home directory or something, just anything to get them out of your
kernel modules directories.  I didn't bother to back them up because i
think it's a simple enough thing to simply reinstall the kernel modules
package and overwrite any damage you may have done. And anyway, it sure
feels good to delete these things after you've been fighting with them
for ages, like i have.)

After you've gotten the ubuntu/sound/alsa-driver out of the way, it's
time to create a symbolic link in its place. while still in that
directory, run "sudo ln -s ../../kernel/sound/ alsa-driver"

Reboot, and  now you should be good to go.

Though keep in mind, you'll probably have to redo part of this each time
a kernel update comes along.  I recommend that you keep around the
folder that the alsa-drivers source lives in (and that you modified
patch_via.c in, ran ./configure in, make, etc) and whenever your
headphones stop working after a kernel update just run sudo make install
from inside there, and follow the steps above to delete ubuntu/sound
/alsa-driver and create a symbolic link.

-- 
Headphone jack does not work in NC1502
https://bugs.launchpad.net/bugs/184314
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