I have my computer dual booted with windows 7 and Ubuntu 10.04. At first, Ubuntu didn't seem to want to use my sound card but I later noticed that it did work with headphones. I later found out that updating my ALSA driver would fix this problem. However, the next day, all of my sound wouldn't work at all. The driver isn't even showing up in the Sounds settings or the GNOME ALSA Mixer. Could someone help me fix this? I have a Compaq Presario CQ62-210US and it has a Realtek HD Audio card (forgot which model number since I no longer can see it on my computer).