Brightness controls do not change brightness

Status changed to 'Confirmed' because the bug affects multiple users.

Same issue

Lenovo Ideapad Z570

Same here (Lenovo B570). Any workaround known?

Same here with the lenovo b570. I have not found a workaround

On Sat, Nov 2, 2013 at 2:39 AM, micred <email address hidden> wrote:

> Same here (Lenovo B570). Any workaround known?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1232952
>
> Title:
> Brightness controls do not change brightness
>
> Status in “udev” package in Ubuntu:
> Confirmed
>
> Bug description:
> When using the brigtness controls i cannot change brightness
>
> ProblemType: Bug
> DistroRelease: Ubuntu 13.10
> Package: xorg 1:7.7+1ubuntu5
> ProcVersionSignature: Ubuntu 3.11.0-9.16-generic 3.11.2
> Uname: Linux 3.11.0-9-generic x86_64
> .tmp.unity.support.test.0:
>
> ApportVersion: 2.12.5-0ubuntu1
> Architecture: amd64
> CompizPlugins: No value set for
> `/apps/compiz-1/general/screen0/options/active_plugins'
> CompositorRunning: compiz
> CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
> CompositorUnredirectFSW: true
> Date: Sun Sep 29 19:24:44 2013
> DistUpgraded: Fresh install
> DistroCodename: saucy
> DistroVariant: ubuntu
> ExtraDebuggingInterest: Yes, if not too technical
> GraphicsCard:
> Intel Corporation 2nd Generation Core Processor Family Integrated
> Graphics Controller [8086:0106] (rev 09) (prog-if 00 [VGA controller])
> Subsystem: Lenovo Device [17aa:3975]
> InstallationDate: Installed on 2013-09-28 (1 days ago)
> InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64
> (20130925.1)
> MachineType: LENOVO 1068BAU
> MarkForUpload: True
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-9-generic.efi.signed
> root=UUID=b3739aad-4814-4571-a223-2d43fd22dd1e ro quiet splash vt.handoff=7
> SourcePackage: xorg
> Symptom: display
> UpgradeStatus: No upgrade log present (probably fresh install)
> dmi.bios.date: 10/27/2011
> dmi.bios.vendor: LENOVO
> dmi.bios.version: 44CN43WW
> dmi.board.asset.tag: Base Board Asset Tag
> dmi.board.name: Emerald Lake
> dmi.board.vendor: LENOVO
> dmi.board.version: FAB1
> dmi.chassis.asset.tag: Asset Tag
> dmi.chassis.type: 10
> dmi.chassis.vendor: LENOVO
> dmi.chassis.version: 0.1
> dmi.modalias:
> dmi:bvnLENOVO:bvr44CN43WW:bd10/27/2011:svnLENOVO:pn1068BAU:pvrLenovoB570:rvnLENOVO:rnEmeraldLake:rvrFAB1:cvnLENOVO:ct10:cvr0.1:
> dmi.product.name: 1068BAU
> dmi.product.version: Lenovo B570
> dmi.sys.vendor: LENOVO
> version.compiz: compiz 1:0.9.10+13.10.20130927.1-0ubuntu1
> version.ia32-libs: ia32-libs N/A
> version.libdrm2: libdrm2 2.4.46-1
> version.libgl1-mesa-dri: libgl1-mesa-dri 9.2-1ubuntu2
> version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
> version.libgl1-mesa-glx: libgl1-mesa-glx 9.2-1ubuntu2
> version.xserver-xorg-core: xserver-xorg-core 2:1.14.2.901-2ubuntu6
> version.xserver-xorg-input-evdev: xserver-xorg-input-evdev
> 1:2.7.3-0ubuntu3.1
> version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu9
> version.xserver-xorg-video-intel: xserver-xorg-video-intel
> 2:2.21.14-4ubuntu4
> version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
> 1:1.0.9-2ubuntu1
> xser...

I found a workaround here: http://ubuntuforums.org/showthread.php?t=2181534

create the file /usr/share/X11/xorg.conf.d/20-intel.conf with the following content:
Code:
Section "Device"
        Identifier "card0"
        Driver "intel"
        Option "Backlight" "intel_backlight"
        BusID "PCI:0:2:0"

EndSection
...and log out and back in again

Same problem on Ubuntu 14.04 and derivates on Asus 1011px netbook. It works with the workaround previously mentioned by micred

Reproduced on Ubuntu 14.04, Asus 1015PEM netbook. Fixed using the workaround by micred.

Same for me Ubuntu Gnome 14.04 amd64 Hp2000-299wm with Mobile Intel GM45 Express Chipset graphics. Workaround in comment #6 works for me.

Not able to follow the instructions mentioned above. Would appreciate with a concise step by step guide.

Finally, comment #6 worked! :)