[Bug 573984] [NEW] Screen brightness can not be adjusted in Lucid for Gateway NV59 with Intel Arrandale graphics

[Tony Diep]

Public bug reported:

PROBLEM
Hot keys for adjusting screen brightness do not work in Karmic or Lucid for Gateway NV59 laptop with Arrandale Graphics.
Under Karmic, workaround was to adjust screen brightness while still in BIOS post.
Karmic would boot with the selected screen brightness

Under Lucid, screen brightness goes to 100% when booting, ignoring brightness set during boot.
Hot keys for adjusting brightness do not work.

RESULTS
Tried the following:

* Setting memory directly under /proc
Results: memory for VGA brightness would change but display wouldn't actually change

CHANGING BOOT PARAMETERS:

# GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nolapic acpi_backlight=vendor"
# above line doesn't solve problem
# GRUB_CMDLINE_LINUX="acpi=off"
# above line allows screen brightness but hyperthreading is off
GRUB_CMDLINE_LINUX="acpi=ht"
# above line allows screen brightness adjustment at cost of power, core temp?
# GRUB_CMDLINE_LINUX="acpi_generic_hotkey"
# above line doesn't solve screen brightness problem
# GRUB_CMDLINE_LINUX="acpi=strict"
# above line does not solve screen brightness problem
# GRUB_CMDLINE_LINUX="acpi_osi=Linux"
# above line does not solve screen brightness problem
# GRUB_CMDLINE_LINUX="acpi=noirq"
# above line doesn't solve
# GRUB_CMDLINE_LINUX="acpi=noacpi"
# above line does not allow screen brightness adjustment
# GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
# above line does not work
# GRUB_CMDLINE_LINUX="i915.modeset=0"
# above line make linux unbootable. Have to book off USB/CD and manually edit grub.conf

BEST WORKAROUND
GRUB_CMDLINE_LINUX="acpi=ht"
# above line allows screen brightness adjustment at cost of power, core temp?


Linux tdlap6 2.6.32-21-generic #32-Ubuntu SMP Fri Apr 16 08:09:38 UTC 2010 x86_64 GNU/Linux

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-21-generic 2.6.32-21.32
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  tonydiep   1621 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf0800000 irq 22'
   Mixer name	: 'Intel G45 DEVIBX'
   Components	: 'HDA:10ec0272,1025033d,00100001 HDA:14f12c06,10250093,00100000 HDA:80862804,80860101,00100000'
   Controls      : 26
   Simple ctrls  : 13
Date: Sun May  2 16:39:17 2010
HibernationDevice: RESUME=/dev/sda5
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: Gateway NV59
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-21-generic root=UUID=53103199-f27c-4ef8-879c-bf122b4216fe ro acpi=ht quiet splash
ProcEnviron:
 LANG=en_CA.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
RfKill:
 0: phy0: Wireless LAN
 	Soft blocked: no
 	Hard blocked: no
SourcePackage: linux
dmi.bios.date: 11/26/2009
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.09
dmi.board.name: NV59
dmi.board.vendor: Gateway
dmi.board.version: Rev
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Gateway
dmi.chassis.version: Rev
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.09:bd11/26/2009:svnGateway:pnNV59:pvrRev:rvnGateway:rnNV59:rvrRev:cvnGateway:ct10:cvrRev:
dmi.product.name: NV59
dmi.product.version: Rev
dmi.sys.vendor: Gateway

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug graphics lucid needs-upstream-testing regression-release

-- 
Screen brightness can not be adjusted in Lucid for Gateway NV59 with Intel Arrandale graphics
https://bugs.launchpad.net/bugs/573984
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