OK, I know this has been a problem for a while, and I know by now this really old Pentium II laptop is really really really obsolete. However, I have installed Lubuntu 10.10 on this laptop and things seem to work fine except the sound.
Now I've read and gone through a bunch of tutorials and guides to working around this, none of which have worked. I have gone through this Ubuntu bug report and that doesn't work either.
The problem I think is that the latest workaround is (understandably) about two Ubuntu versions behind. Now I'm not sure what has changed since then to make that workaround not work, but I would appreciate any help.