The kernel change for Trusty is to control the mute led status, It is difficult to backport the dell mute led controlling patch to trusty kernel since the driver framework has greatly changed. But fortunately we have alsa daily dkms, this fix was already in the alsa daily dkms for Trusty.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1339998 Title: [Dell Latitude 12 Rugged Extreme 7204] Microphone mute key does not work To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1339998/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs