Brightness doesn't work correctly on iMac5,1

[Alejandro Martínez]

The brightness slider on an iMac5,1 doesn't work correctly, that is, when moved it flickers through higher and lower brightness levels, some of then even turning the screen off while the slider is on the higher values.

Also, when the screen sleeps the brightness goes off and the screen doesn't turn on again when I move the mouse, even though the system still works (is accessible via VNC).

Graphics controller is:
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xorg 1:7.6+7ubuntu7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: wl
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Mon Oct 10 10:01:15 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus: bcmwl, 5.100.82.38+bdcom, 3.0.0-12-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Intel Corporation Device [8086:7270]
   Subsystem: Intel Corporation Device [8086:7270]
MachineType: Apple Computer, Inc. iMac5,2
ProcEnviron:
 PATH=(custom, no user)
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-12-generic root=/dev/mapper/imac-root ro
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/27/07
dmi.bios.vendor: Apple Computer, Inc.
dmi.bios.version: IM52.88Z.0090.B09.0706270913
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Mac-F4218EC8
dmi.board.vendor: Apple Computer, Inc.
dmi.board.version: DVT
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 13
dmi.chassis.vendor: Apple Computer, Inc.
dmi.chassis.version: Mac-F4218EC8
dmi.modalias: dmi:bvnAppleComputer,Inc.:bvrIM52.88Z.0090.B09.0706270913:bd06/27/07:svnAppleComputer,Inc.:pniMac5,2:pvr1.0:rvnAppleComputer,Inc.:rnMac-F4218EC8:rvrDVT:cvnAppleComputer,Inc.:ct13:cvrMac-F4218EC8:
dmi.product.name: iMac5,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Computer, Inc.
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu3
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Bryce Harrington (bryce)]

Hey yosoyzenitram,

Hi, thanks for reporting this issue during the development period of
Ubuntu.

I notice there's not been further comments to the bug report since the
release came out, would you mind updating us on the status of it in the
release?

Are you still able to reproduce the issue? If not, do you think the bug
report can be closed, or do you think we should continue tracking it?

[Launchpad Janitor (janitor)]

[Expired for xserver-xorg-video-intel (Ubuntu) because there has been no activity for 60 days.]

[Alejandro Martínez (zenitram)]

Hello,

Sorry for the delay.. the notification email went to some random location of my email inbox.

This keeps happening to me on the final version.