Comment 4 for bug 156771

Problem solved. In fact, there was never a problem (in Ubuntu). I realized that the sound state depended on how I would reboot my computer. If I run Vista and I want o log into Uduntu, I have to unplug the power cord from the laptop before rebooting. Then, I have sound. There is no way to have sound if the last time I was using Windows, the computer was plugged. Now, I don't understand what is going on there but the at least, I know how to have sound now.