Are you using your laptop with the lid closed, or is there just no sound after you reopen it?
Also, please try running this command before and after the problem occurs: $ ps ux | grep pulseaudio I suspect the issue might be that the pulseaudio process is vanishing. ** Changed in: pulseaudio (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1707027 Title: Sound device no longer detected after closing laptop lid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1707027/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs