I solved to problem by changing my sound card option in the BIOS. There I find my front panel is using 'HD'. I change it to 'AC97' and after rebooting everything goes fine.
** Changed in: alsa-driver (Ubuntu) Assignee: (unassigned) => Mingxuan Ran (ranmx) ** Changed in: alsa-driver (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1611286 Title: No sound on front panel after upgrading from Ubunt 14.04 to Ubuntu 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1611286/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs