Bug#830683: no sound anymore after upgrade to 9.0-1.1

[Tsu Jan]

The same thing happened here. I first downgraded to 8.0-2+b2 and had 
sound again. Then Google lead me to this report and I upgraded 
pulseaudio but, this time, installed pulseaudio-module-udev too, which 
solved the problem.
Therefore, for some reason, pulseaudio-module-udev was quite needed here.
IMO, pulseaudio-module-udev shouldn't be among "Recommends" anymore. 
After all, recommending something means that it is NOT essential to the 
functioning.