Comment 0 for bug 1394063

Hardware keys on an inspirion 3138 for brightness don't work. Xev doesn't show a keypress event.

Scan codes from evtest are shown below

Event: time 1416367751.898584, -------------- EV_SYN ------------
Event: time 1416367754.952917, type 4 (EV_MSC), code 4 (MSC_SCAN), value 85
Event: time 1416367754.952917, type 1 (EV_KEY), code 224 (KEY_BRIGHTNESSDOWN), value 1
Event: time 1416367754.952917, -------------- EV_SYN ------------
Event: time 1416367754.952946, type 1 (EV_KEY), code 224 (KEY_BRIGHTNESSDOWN), value 0
Event: time 1416367754.952946, -------------- EV_SYN ------------
Event: time 1416367756.898936, type 4 (EV_MSC), code 4 (MSC_SCAN), value 86
Event: time 1416367756.898936, type 1 (EV_KEY), code 225 (KEY_BRIGHTNESSUP), value 1
Event: time 1416367756.898936, -------------- EV_SYN ------------
Event: time 1416367756.898968, type 1 (EV_KEY), code 225 (KEY_BRIGHTNESSUP), value 0

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: udev 215-5ubuntu2
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
ApportVersion: 2.14.7-0ubuntu10
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Nov 18 22:16:25 2014
InstallationDate: Installed on 2014-06-04 (167 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Dell Inc. Inspiron 3137
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic.efi.signed root=UUID=0e352344-90e9-4cbe-acde-376a88cf5b47 ro quiet splash vt.handoff=7
SourcePackage: systemd
UpgradeStatus: Upgraded to vivid on 2014-06-04 (167 days ago)
dmi.bios.date: 12/25/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0PRDX0
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA05:bd12/25/2013:svnDellInc.:pnInspiron3137:pvr:rvnDellInc.:rn0PRDX0:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Inspiron 3137
dmi.sys.vendor: Dell Inc.