Bug#703484: Suddenly No Sound Again

[Tsu Jan]

It seems that the problem is deeper. After several hours, suddenly not
only there was no sound but even media players (Totem, Gnome-MPlayer,
SMPlayer) couldn't play videos (ffplay played videos without audio).

Logging out of Gnome and logging into IceWM didn't do anything but GDM
had its system sound working. Only killing and restarting PA solved the
issue.

I couldn't find any error message.