I just upgrade to Ubuntu Hardy, and sound gone off. Then I installed alsamixergui, and I saw that sound is muted. It was not shown on console version of alsamixer. The problem was that, the main channel is muted. I unmute it, and worked.
I just upgrade to Ubuntu Hardy, and sound gone off. Then I installed alsamixergui, and I saw that sound is muted. It was not shown on console version of alsamixer. The problem was that, the main channel is muted. I unmute it, and worked.