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[Sean V Kelley <seanvk@xxxxxxxxxxxx>]

This also affects my MacBook Pro 11,1 with Retina Display running 15.04
(vivid).  Brightness keys do not work.  But command line
/sys/class/backlight/intel_backlight/ does work for manual adjustment.

Sean

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https://bugs.launchpad.net/bugs/1394063

Title:
  [vivid regression] brightness keys aren't recognized

Status in “unity-settings-daemon” package in Ubuntu:
  Confirmed

Bug description:
  Hardware keys on an inspirion 3137 for brightness don't work. Manually setting the backlight via /sys/class/backlight/intel_backlight/brightness
   works properly. This worked properly in utopic and has been broken since upgrade to vivid.

  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.

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