[Cooker] Sound issue

Since some time ago, when I start session my sound is muted (speaker icon shows muted).
When unmuting, ever is at 100% volume (this is a problem if you don't remember this and you are using headphones).

I think the change to 2.6.30 has something to see. Yesterday, I reinstalled my cooker setup to x86_64. For some reason, the kernel was not updated. When starting session, volume didn't work, but it was not muted (the icon was not the 'muted' one). But pulseaudio didn't work.

The problem was that the new version of udev was asking for a 2.6.30 kernel to enable something to let pulseaudio work. Once updated the kernel, pulse returned to work, but also returned the muted sound issue.

Regards