By downgrading my systems (two) from a backup dated jan, 5th and upgrading step by step it seems to be the update of package
>alsa-utils (1.0.18-1ubuntu4 to 1.0.18-1ubuntu5 which is responsible for the malfunction described above (not the pulseaudio packages) ** Also affects: alsa-utils Importance: Undecided Status: New -- [Jaunty] Sound card outputs start muted after recent updates to use pulseaudio https://bugs.launchpad.net/bugs/315809 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs