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[bruno pennec <1074960@xxxxxxxxxxxxxxxxxx>]

With last upgrade to Ubuntu 14.10, (kernel  3.16.0-23-generic + fglrx 14.2), 
this bug is now solved with acpi_osi=Linux on linux boot command line. 

So, I would propose to close the bug.

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https://bugs.launchpad.net/bugs/1074960

Title:
  [Toshiba L850D-11Z] Backlight keys don't work with fglrx-installer

Status in “fglrx-installer” package in Ubuntu:
  New
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Backlight keys work (I get the slider on screen) , but there is no
  change on brightness.

  Other tests :
     - kernel 3.6.5 (ppa) gives same result than kernel 3.5.0-17 (default 12.10 configuration)
     - when Backlight is set to a new value(on the slider), a sleep and a wake up set the correct value on screen brightness

     - L850D-11Z is a dual GPU (AMD A8), so I take a look at acpi tree :
              - there is 2 directory acpi_vga0 and acpi_vga1 for the 2 radeon GPU
              - /sys/class/backlight/acpi_vgaX/actual_brightness had the right value (in the 2 directory)
              - changing /sys/class/backlight/acpi_vgaX/brightness change actual_brightness but had no effect on screen  too

  From the log :
  On dmesg, i have this 2 errors, but they don't seem to be related to backlight variable _BCL :
  [   30.212195] ACPI Error: Method parse/execution failed [\_SB_.PCI0.VGA_.AF03] (Node ffff8801a665c000), AE_AML_INFINITE_LOOP (20120711/psparse-536)
  [   30.212214] ACPI Error: Method parse/execution failed [\_SB_.PCI0.VGA_.ATIF] (Node ffff8801a665ad98), AE_AML_INFINITE_LOOP (20120711/psparse-536)

  I do the standard reports on acpi, and get the following result :

  In result.log :
  PASSED: Test 88, Method _BCL returned a sane package of 10 integers.
  PASSED: Test 88, \_SB_.PCI0.PB3_.VGA_.LCD_._BCL correctly acquired and released locks 5 times.

  Test 89 of 94: Check _BCM (Set Brightness Level).
  ACPICA Exception AE_AML_PACKAGE_LIMIT during execution of method BLMP
  FAILED [CRITICAL] AEAMLPackgeLimit: Test 89, Detected error 'Package limit' when evaluating
  '\_SB_.PCI0.VGA_.LCD_._BCM'.
  PASSED: Test 89, \_SB_.PCI0.VGA_.LCD_._BCM correctly acquired and released locks 7 times.
  ACPICA Exception AE_AML_PACKAGE_LIMIT during execution of method BLMP
  FAILED [CRITICAL] AEAMLPackgeLimit: Test 89, Detected error 'Package limit' when evaluating
  '\_SB_.PCI0.PB2_.VGA_.LCD_._BCM'.
  PASSED: Test 89, \_SB_.PCI0.PB2_.VGA_.LCD_._BCM correctly acquired and released locks 7 times.
  ACPICA Exception AE_AML_PACKAGE_LIMIT during execution of method BLMP
  FAILED [CRITICAL] AEAMLPackgeLimit: Test 89, Detected error 'Package limit' when evaluating
  '\_SB_.PCI0.PB3_.VGA_.LCD_._BCM'.
  PASSED: Test 89, \_SB_.PCI0.PB3_.VGA_.LCD_._BCM correctly acquired and released locks 7 times.

  So i join DSDT.dsl to this report. I would add result.log if it is
  needed.

  WORKAROUND: Use the open source radeon driver.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: linux-image-3.5.0-17-generic 3.5.0-17.28
  ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
  Uname: Linux 3.5.0-17-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  bpennec    2051 F.... pulseaudio
   /dev/snd/controlC0:  bpennec    2051 F.... pulseaudio
  Date: Sun Nov  4 20:14:31 2012
  HibernationDevice: RESUME=UUID=4de0f688-762d-4c47-92ca-902baa5062a1
  InstallationDate: Installed on 2012-11-02 (2 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: TOSHIBA SATELLITE L850D-11Z
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic root=UUID=43b5124e-2519-4e84-affb-124b98be7670 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-17-generic N/A
   linux-backports-modules-3.5.0-17-generic  N/A
   linux-firmware                            1.95
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/31/2012
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: 1.20
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Pumori
  dmi.board.vendor: AMD
  dmi.board.version: Base Board Version
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: OEM Chassis Manufacturer
  dmi.chassis.version: OEM Chassis Version
  dmi.modalias: dmi:bvnInsydeCorp.:bvr1.20:bd07/31/2012:svnTOSHIBA:pnSATELLITEL850D-11Z:pvrPSKECE-01G009FR:rvnAMD:rnPumori:rvrBaseBoardVersion:cvnOEMChassisManufacturer:ct10:cvrOEMChassisVersion:
  dmi.product.name: SATELLITE L850D-11Z
  dmi.product.version: PSKECE-01G009FR
  dmi.sys.vendor: TOSHIBA

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