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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1321280

Title:
  Sometimes can't adjust screen brightness

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Sometimes, the screen brightness controls work on my laptop, and
  sometimes they don't. I haven't noticed any pattern as to when it
  works or doesn't.

  When it doesn't work, I press Fn+F6/F7 to adjust the screen
  brightness. The notification pop-up appears, showing the new
  brightness setting -- but the brightness doesn't actually change.
  Rebooting fixes the issue. There is nothing in syslog or dmesg.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.47
  ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  mike       4459 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue May 20 09:55:01 2014
  HibernationDevice: RESUME=UUID=f989c947-43a9-46bf-9966-d1defa7837e3
  InstallationDate: Installed on 2013-01-12 (492 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: TOSHIBA TECRA R700
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-24-generic root=/dev/mapper/ubuntu-root ro quiet splash crashkernel=384M-:128M crashkernel=384M-:128M vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127.2
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-05-08 (11 days ago)
  dmi.bios.date: 12/22/2011
  dmi.bios.vendor: TOSHIBA
  dmi.bios.version: Version 2.20
  dmi.board.asset.tag: 0000000000
  dmi.board.name: Portable PC
  dmi.board.vendor: TOSHIBA
  dmi.board.version: Version A0
  dmi.chassis.asset.tag: 0000000000
  dmi.chassis.type: 10
  dmi.chassis.vendor: TOSHIBA
  dmi.chassis.version: Version 1.0
  dmi.modalias: dmi:bvnTOSHIBA:bvrVersion2.20:bd12/22/2011:svnTOSHIBA:pnTECRAR700:pvrPT318C-00F001:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
  dmi.product.name: TECRA R700
  dmi.product.version: PT318C-00F001
  dmi.sys.vendor: TOSHIBA

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