kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Gaele Strootman, the next step is to fully commit bisect from kernel
3.19 to 4.2 in order to identify the last good kernel commit, followed
immediately by the first bad one. This will allow for a more expedited
analysis of the root cause of your issue. Could you please do this
following https://wiki.ubuntu.com/Kernel/KernelBisection ?

Please note, finding adjacent kernel versions is not fully commit
bisecting.

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

** Tags added: kernel-bug-exists-upstream-4.3

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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

Title:
  [MacBookPro11,3] Backlight control does not work, but there are
  entries in /sys/class/backlight

Status in linux package in Ubuntu:
  Incomplete

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

  /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

  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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