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[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

Still exist with the latest mainline kernel 3.15.0-999 #201406150235

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https://bugs.launchpad.net/bugs/1330311

Title:
  AMD Radeon 8210 [1002:9834] Brightness reset to max after reboot

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  CID: 201308-14057 Dell Inspiron 3135

  The screen birightness will be reset to max after reboot.
  This issue exists with the open-source driver and the proprietary driver.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-29-generic 3.13.0-29.53
  ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
  Uname: Linux 3.13.0-29-generic x86_64
  NonfreeKernelModules: wl fglrx
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     1385 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     1385 F.... pulseaudio
  CRDA:
   country TW:
   	(2402 - 2472 @ 40), (3, 27)
   	(5270 - 5330 @ 40), (3, 17), DFS
   	(5735 - 5815 @ 40), (3, 30)
  CurrentDesktop: Unity
  Date: Mon Jun 16 09:54:40 2014
  HibernationDevice: RESUME=UUID=f0ab6a25-db04-446e-b350-d1a720224516
  InstallationDate: Installed on 2014-06-13 (2 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Dell Inc. Inspiron 3135
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=79ae50e4-963d-4e27-8deb-4330e1220b09 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-29-generic N/A
   linux-backports-modules-3.13.0-29-generic  N/A
   linux-firmware                             1.127.2
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/13/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: X11
  dmi.board.name: BNE3A1
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X02
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: X11
  dmi.modalias: dmi:bvnDellInc.:bvrX11:bd08/13/2013:svnDellInc.:pnInspiron3135:pvr:rvnDellInc.:rnBNE3A1:rvrX02:cvnDellInc.:ct8:cvrX11:
  dmi.product.name: Inspiron 3135
  dmi.sys.vendor: Dell Inc.

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