I am also having this problem but i figure it out. There may be a firefox running in background
In terminal type "killall firefox" it will close all firefox. If you start firefox then you hear the sound.
Hope you can understand this.
I am also having this problem but i figure it out. There may be a firefox running in background
In terminal type "killall firefox" it will close all firefox. If you start firefox then you hear the sound.
Hope you can understand this.