Hi Po-Hsu, And about the icon problem, when you press mic mute hotkey, the osd shows the speaker icon instead of microphone icon, i think this is a bug for unity-settings-daemon, and the patch in the comment #7 can fix it.
Please open a unity-settings-daemon bug to track this problem and involve the desktop development team in. ** Changed in: linux (Ubuntu) Status: Confirmed => Fix Released ** Changed in: hwe-next Status: Triaged => Fix Released ** Changed in: hwe-next Assignee: (unassigned) => Hui Wang (hui.wang) ** Changed in: hwe-next Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1381856 Title: [Dell Latitude E5550] Microphone mute key does not work on this system To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1381856/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs