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[Gaele Strootman <gaele@xxxxxxxxxxxx>]

Public bug reported:

Backlight control stopped working after upgrade from Vivid to Wily.

Macbook Pro 11,3 with nouveau.

/sys/class/backlight/gmux_backlight$ grep . *
actual_brightness:16777215
bl_power:0
brightness:400
grep: device: Is a directory
max_brightness:-1
grep: power: Is a directory
grep: subsystem: Is a directory
type:platform


See https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1115555

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-16-generic 4.2.0-16.19
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  gaele      2525 F.... pulseaudio
 /dev/snd/controlC0:  gaele      2525 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Nov  3 13:44:25 2015
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=716bc023-ef4e-436e-8e5b-5a1f548faef8
InstallationDate: Installed on 2015-04-26 (190 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: Apple Inc. MacBookPro11,3
ProcFB: 0 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic.efi.signed root=UUID=38c8fe6d-3763-4619-a710-f65494173fe4 ro quiet splash libata.force=noncq vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-16-generic N/A
 linux-backports-modules-4.2.0-16-generic  N/A
 linux-firmware                            1.149
SourcePackage: linux
UpgradeStatus: Upgraded to wily on 2015-10-22 (11 days ago)
dmi.bios.date: 06/05/2015
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP112.88Z.0138.B15.1506050548
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-2BD1B31983FE1663
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro11,3
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-2BD1B31983FE1663
dmi.modalias: dmi:bvnAppleInc.:bvrMBP112.88Z.0138.B15.1506050548:bd06/05/2015:svnAppleInc.:pnMacBookPro11,3:pvr1.0:rvnAppleInc.:rnMac-2BD1B31983FE1663:rvrMacBookPro11,3:cvnAppleInc.:ct10:cvrMac-2BD1B31983FE1663:
dmi.product.name: MacBookPro11,3
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug wily

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https://bugs.launchpad.net/bugs/1512691

Title:
  [Macbook Pro] Backlight control does not work, but there are entries
  in /sys/class/backlight

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Backlight control stopped working after upgrade from Vivid to Wily.

  Macbook Pro 11,3 with nouveau.

  /sys/class/backlight/gmux_backlight$ grep . *
  actual_brightness:16777215
  bl_power:0
  brightness:400
  grep: device: Is a directory
  max_brightness:-1
  grep: power: Is a directory
  grep: subsystem: Is a directory
  type:platform

  
  See https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1115555

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-16-generic 4.2.0-16.19
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.19.1-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  gaele      2525 F.... pulseaudio
   /dev/snd/controlC0:  gaele      2525 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Nov  3 13:44:25 2015
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=716bc023-ef4e-436e-8e5b-5a1f548faef8
  InstallationDate: Installed on 2015-04-26 (190 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Apple Inc. MacBookPro11,3
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic.efi.signed root=UUID=38c8fe6d-3763-4619-a710-f65494173fe4 ro quiet splash libata.force=noncq vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-16-generic N/A
   linux-backports-modules-4.2.0-16-generic  N/A
   linux-firmware                            1.149
  SourcePackage: linux
  UpgradeStatus: Upgraded to wily on 2015-10-22 (11 days ago)
  dmi.bios.date: 06/05/2015
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP112.88Z.0138.B15.1506050548
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-2BD1B31983FE1663
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro11,3
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-2BD1B31983FE1663
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP112.88Z.0138.B15.1506050548:bd06/05/2015:svnAppleInc.:pnMacBookPro11,3:pvr1.0:rvnAppleInc.:rnMac-2BD1B31983FE1663:rvrMacBookPro11,3:cvnAppleInc.:ct10:cvrMac-2BD1B31983FE1663:
  dmi.product.name: MacBookPro11,3
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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