apport information

** Attachment added: "RfKill.txt"

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  Lenovo E540: Brightness control does not work

Status in linux package in Ubuntu:

Bug description:
  After last Ubuntu updates, brightness control buttons stopped to work, 
brightness is stuck on maximum. When pressing key to reduce brightness, 
indicator shows up as it should, but doesn't let to reduce the indicator any 
step lower. Running Ubuntu 14.04 LTS.
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: amd64
   /dev/snd/controlC0:  lenovou    2662 F.... pulseaudio
   /dev/snd/controlC1:  lenovou    2662 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=0b3d8bde-fcba-4eb8-8ec0-9218338b66ad
  InstallationDate: Installed on 2015-02-14 (176 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 
  MachineType: LENOVO 20C6003QMS
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-61-generic 
root=UUID=c4dc0d94-61b2-4b8b-b547-79fea553646b ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-61.100-generic 3.13.11-ckt22
   linux-restricted-modules-3.13.0-61-generic N/A
   linux-backports-modules-3.13.0-61-generic  N/A
   linux-firmware                             1.127.14
  Tags:  trusty
  Uname: Linux 3.13.0-61-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True 08/29/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: J9ET93WW (2.13 )
  dmi.board.asset.tag: Not Available 20C6003QMS
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98401 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
dmi:bvnLENOVO:bvrJ9ET93WW(2.13):bd08/29/2014:svnLENOVO:pn20C6003QMS:pvrThinkPadEdgeE540:rvnLENOVO:rn20C6003QMS:rvr0B98401WIN:cvnLENOVO:ct10:cvrNotAvailable: 20C6003QMS
  dmi.product.version: ThinkPad Edge E540
  dmi.sys.vendor: LENOVO

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