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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu Vivid)
     Assignee: Joseph Salisbury (jsalisbury) => Timo Aaltonen (tjaalton)

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https://bugs.launchpad.net/bugs/1440270

Title:
  regression: backlight can't be adjusted on UX32VD with
  3.19.0-12-generic kernel

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Vivid:
  In Progress

Bug description:
  The keyboard buttons are working as I get the on screen notification.
  But it has no effect on the backlight itself.

  I rebooted and switched back to 3.19.0-11-generic which works fine,
  rebooted and went back to 3.19.0-12-generic and it stopped working
  again, so very confident something broke in the new kernel version.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-12-generic 3.19.0-12.12
  ProcVersionSignature: Ubuntu 3.19.0-12.12-generic 3.19.3
  Uname: Linux 3.19.0-12-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.17-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  snafu109   2549 F.... pulseaudio
  CurrentDesktop: XFCE
  Date: Fri Apr  3 21:34:50 2015
  HibernationDevice: RESUME=UUID=4e46a15c-d441-4b34-ae15-a93302da75a5
  InstallationDate: Installed on 2012-12-26 (828 days ago)
  InstallationMedia: Xubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120817.3)
  MachineType: ASUSTeK COMPUTER INC. UX32VD
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-12-generic root=UUID=687d7b6d-6fe2-413c-84c1-ed511edff5f9 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-12-generic N/A
   linux-backports-modules-3.19.0-12-generic  N/A
   linux-firmware                             1.143
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-03-10 (24 days ago)
  dmi.bios.date: 01/29/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: UX32VD.214
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: UX32VD
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX32VD.214:bd01/29/2013:svnASUSTeKCOMPUTERINC.:pnUX32VD:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX32VD:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: UX32VD
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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