This is also happening to me in my Acer aspire 5520 laptop. I must reboot to have it back.
My sound board: 00:07.0 Audio device: nVidia Corporation MCP67 High Definition Audio (rev a1) -- Occasional no sound from KDE programs https://bugs.launchpad.net/bugs/540796 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
