Comment 0 for bug 1074960

Hi,

Symptoms :
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.
best regards,
bruno

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