I also had exactly the same problem like you guys. I fixed it with just typing 4 commands. I hope it works for you:
sudo apt-get install module-assistant sudo m-a update sudo m-a prepare sudo m-a a-i alsa
After this you just have to restart your system. It should work now
I also had exactly the same problem like you guys.
I fixed it with just typing 4 commands. I hope it works for you:
sudo apt-get install module-assistant
sudo m-a update
sudo m-a prepare
sudo m-a a-i alsa
After this you just have to restart your system. It should work now