Public bug reported:

Just trying new Ubuntu 11.04;  Lowest default brightness makes screen
barely visible.

ATI Catalyst Control Center does not work and brightness control applet
in panel also makes nothing.

I can't change screen brightness level.

Same problem in Xubuntu Natty.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: gnome-power-manager 2.32.0-2ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: fglrx wl
Architecture: amd64
Date: Fri Apr 29 18:23:03 2011
GnomeSessionIdleInhibited: Unknown
GnomeSessionInhibitors: Failed to acquire
GnomeSessionSuspendInhibited: Unknown
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: Hewlett-Packard HP Compaq 6735b
ProcEnviron:
 LANGUAGE=es:en_US:en_AU:en_CA:en_GB:en
 PATH=(custom, no user)
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic 
root=UUID=85753454-c858-4895-b526-fbaf05fe11ff ro acpi_osi=Linux quiet splash 
vt.handoff=7
SourcePackage: gnome-power-manager
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/19/2008
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68GTT Ver. F.07
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 30E3
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 96.1C
dmi.chassis.asset.tag: CNU8414XL2
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: 
dmi:bvnHewlett-Packard:bvr68GTTVer.F.07:bd09/19/2008:svnHewlett-Packard:pnHPCompaq6735b:pvrF.07:rvnHewlett-Packard:rn30E3:rvrKBCVersion96.1C:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP Compaq 6735b
dmi.product.version: F.07
dmi.sys.vendor: Hewlett-Packard

** Affects: ubuntu
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug natty

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https://bugs.launchpad.net/bugs/773415

Title:
  Natty: Screen brightness set to minimum and brightness controls not
  working

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