Thank you for taking the time to report this bug and helping to make Ubuntu better. I would start here :
Note 1. Intrepid users: due to a bug in the ALSA libraries, your PCM mixer may occasionally become muted or reset to 0% volume. If you cannot hear sound - or hear a faint crackling - refer to Part C, Step 3. Part C 3. Ensure that your sound card's PCM mixer is not muted or set to 0% volume (this appears to be a bug in Intrepid): Code: $ alsamixer -Dhw Note: When the PulseAudio ALSA plugins are active, you must explicitly specify your hardware device in alsamixer (marked in blue above), otherwise it will open the PulseAudio mixer. 4. Log out & back in for changes to take effect! That is from this thread: http://ubuntuforums.org/showthread.php?p=4928900 additionally you may try: https://wiki.ubuntu.com/DebuggingSoundProblems and report your findings back here. -- No Sound https://bugs.launchpad.net/bugs/313053 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