Updated to 17.04, issue is still there. I think it comes from alsa driver instead of pulseaudio.
** Package changed: pulseaudio (Ubuntu) => alsa-driver (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1653687 Title: No sound after some time Status in alsa-driver package in Ubuntu: New Bug description: Since a few weeks the sound is suddenly stopping on my laptop after some time. This can happen when I play music with Spotify, talk with Skype or play with Steam. The only way to get the sound back is to restart the computer. I tried to follow the sound troubleshooting procedure (https://help.ubuntu.com/community/SoundTroubleshootingProcedure) but it didn't solved my issue. Attached are the information generated by the also-info script and the pulseaudio log taken while the issue occurred. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1653687/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp