Comment 21 for bug 184314

Well, gaining back sound after the update makes sense, as there was a new kernel update pushed out over the last few days, so when you installed the updates it overwrote all of the previous work, like I warned might happen in my previous post.

Now, as for the whole no sound thing, that is a good-ish sign. At least it means that the default drivers in the ubuntu/sound directory are no more. And it means that one of two things is going on: either the drivers did not properly install in kernel/sound or your symbolic link to kernel/sound is broken in some way. So go ahead and try this:

cd /lib/modules/`uname -r`/kernel/sound

then run an 'ls' command from that directory; you should see a list of folders, named things like acore, drivers, i2c, isa, misc, pci, pcmcia, soc, synth, and usb. If you see something radically different (like, say, no directories, just two files, or maybe just one directory) then your compile and install routine didn't go correctly, and you should try again and be extra careful to do everything correctly.

but i'd bet that your problem is the symbolic link. rm anything named alsa-driver that might already be in /lib/modules/`uname -r`/ubuntu/sound, then, while in the ubuntu/sound directory, run:

sudo ln -s ../../kernel/sound/ alsa-driver

after you finish creating that link, go ahead and run "cd alsa-driver". then run ls, and it should report the same list of directories that running ls from kernel/sound (as done above) gives you.

I'm sure your solution is close at hand, just keep working at it.