In my side the issue is fixed by a patch: https://code.launchpad.net/~yuningdodo/ubuntu/trusty/unity-settings-daemon/unity-settings-daemon.lp1396464-set-volume-to-zero-before-mute/+merge/242869
it seems volume can't be set to zero if we have already "set mute", so my solution is adjusting volume before setting mute. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1396464 Title: Audio switch between mute and unmute automatically and repeatedly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-settings-daemon/+bug/1396464/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
