I had sound on the Ubuntu 10/4. Then with the upgrade, I had sound here and there on the Ubuntu 10/10, and if no sound at all, would restart until I got sound. Then I reinstalled the Ubuntu 10/10 cleanly. Again I had sound halfway, but enough to play music videos. Now after running some AlsaDriver updates, I have no sound anymore, even if I restart. Friends have suggested to look at the AlsaMixer, PulseAudio, and Sound Mixer, but I don't know where to find that. I found the others on the terminal, but am not sure exactly what I should do. I'm new to Linux. It's not the sound card, because I have sound Windows-side. So please any advice? Another friend thinks that I must wait until the next Ubuntu version update in 6 months, to fix this sound problem. I have an Acer-Aspire 7736ZG laptop.