Comment 0 for bug 1381856

CID: 201406-15271 Dell Latitude E5550

The microphone mute key does not work at all.

Key event cannot be captured by "xev" or "sudo showkey -s"
But keycode 248 would be returned when testing with sudo showkey -k

Alsa info:
http://www.alsa-project.org/db/?f=006099fcf08709c82a74dba986a907a602a868ab

Also note that with file at /etc/udev/hwdb.d/60-dell-mic-mute-hotkey.hwdb generated with the following content:
# Dell platform kernel driver
keyboard:name:Dell WMI hotkeys:dmi:bvn*:bvr*:bd*:svnDell*:pn*
 KEYBOARD_KEY_150=f20 # Mic mute toggle

And with udev database updated: sudo udevadm hwdb -u

The microphone mute key works, but the mic mute led does not work.
(Also the icon is not correct, which show a speaker instead of a mic)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-37-generic 3.13.0-37.64
ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
Uname: Linux 3.13.0-37-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 1530 F.... pulseaudio
 /dev/snd/controlC1: ubuntu 1530 F.... pulseaudio
CRDA:
 country TW:
  (2402 - 2472 @ 40), (3, 27)
  (5270 - 5330 @ 40), (3, 17), DFS
  (5735 - 5815 @ 40), (3, 30)
CurrentDesktop: Unity
Date: Wed Oct 15 23:17:51 2014
HibernationDevice: RESUME=UUID=02cbc1f1-a261-484c-8fc2-05b68f73446d
InstallationDate: Installed on 2014-10-09 (6 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Dell Inc. Latitude E5550
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic root=UUID=d3b20ae5-9ff8-49b3-b640-1c6a9f264710 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-37-generic N/A
 linux-backports-modules-3.13.0-37-generic N/A
 linux-firmware 1.127.7
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/25/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: T43
dmi.board.name: 0141B2
dmi.board.vendor: Dell Inc.
dmi.board.version: X02
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrT43:bd07/25/2014:svnDellInc.:pnLatitudeE5550:pvr01:rvnDellInc.:rn0141B2:rvrX02:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E5550
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.