Comment 3 for bug 1244645

I found the fix myself, Create /usr/share/X11/xorg.conf.d/20-intel.conf
with the following text:

Section "Device"
    Identifier "card0"
    Driver "intel"
    Option "Backlight" "intel_backlight"
    BusID "PCI:0:2:0"

EndSection

On Tue, Jan 7, 2014 at 4:45 PM, Christopher M. Penalver <
<email address hidden>> wrote:

> Jack Ramsay, could you please test the latest upstream kernel available
> (not the daily folder) following
> https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional
> upstream developers to examine the issue. Once you've tested the upstream
> kernel, please comment on which kernel version specifically you tested. If
> this bug is fixed in the mainline kernel, please add the following tags:
> kernel-fixed-upstream
> kernel-fixed-upstream-VERSION-NUMBER
>
> where VERSION-NUMBER is the version number of the kernel you tested. For
> example:
> kernel-fixed-upstream-v3.13-rc7
>
> This can be done by clicking on the yellow circle with a black pencil icon
> next to the word Tags located at the bottom of the bug description. As
> well, please remove the tag:
> needs-upstream-testing
>
> If the mainline kernel does not fix this bug, please add the following
> tags:
> kernel-bug-exists-upstream
> kernel-bug-exists-upstream-VERSION-NUMBER
>
> As well, please remove the tag:
> needs-upstream-testing
>
> Once testing of the upstream kernel is complete, please mark this bug's
> Status as Confirmed. Please let us know your results. Thank you for your
> understanding.
>
> ** Tags added: saucy
>
> ** Tags added: latest-bios-44cn43ww
>
> ** Package changed: xserver-xorg-video-intel (Ubuntu) => linux (Ubuntu)
>
> ** Changed in: linux (Ubuntu)
> Importance: Undecided => Low
>
> ** Changed in: linux (Ubuntu)
> Status: New => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1244645
>
> Title:
> Brightness is at 100 percent and will not change
>
> Status in “linux” package in Ubuntu:
> Incomplete
>
> Bug description:
> I have seen this issue before as it was in the 13.10 betas. When I try
> any setting and method to change the brigtness it fails and remains at
> 100%. PLease feel free to contact me to get more information
>
> ProblemType: Bug
> DistroRelease: Ubuntu 14.04
> Package: xorg 1:7.7+1ubuntu6
> ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
> Uname: Linux 3.11.0-12-generic x86_64
> NonfreeKernelModules: wl
> .tmp.unity.support.test.0:
>
> ApportVersion: 2.12.6-0ubuntu1
> 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
> CurrentDmesg:
> [ 22.303888] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [ 22.304339] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [ 54.899779] ISO 9660 Extensions: Microsoft Joliet Level 3
> [ 54.952839] ISO 9660 Extensions: RRIP_1991A
> Date: Fri Oct 25 07:36:52 2013
> DistUpgraded: Fresh install
> DistroCodename: trusty
> DistroVariant: ubuntu
> DkmsStatus: bcmwl, 6.30.223.141+bdcom, 3.11.0-12-generic, x86_64:
> installed
> ExtraDebuggingInterest: Yes
> 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 2013-10-25 (0 days ago)
> InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64
> (20131021.1)
> MachineType: LENOVO 1068BAU
> MarkForUpload: True
> ProcEnviron:
> LANGUAGE=en_US
> TERM=xterm
> PATH=(custom, no user)
> LANG=en_US.UTF-8
> SHELL=/bin/bash
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic.efi.signed
> root=UUID=96b54589-c267-4291-b79c-3ff62dddb522 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+13.10.20131011-0ubuntu1
> version.ia32-libs: ia32-libs N/A
> version.libdrm2: libdrm2 2.4.46-3ubuntu1
> version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.2-1ubuntu1
> version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
> version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.2-1ubuntu1
> version.xserver-xorg-core: xserver-xorg-core 2:1.14.3-3ubuntu3
> version.xserver-xorg-input-evdev: xserver-xorg-input-evdev
> 1:2.7.3-0ubuntu3.1
> version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
> version.xserver-xorg-video-intel: xserver-xorg-video-intel
> 2:2.99.904-0ubuntu2
> version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
> 1:1.0.9-2ubuntu1
> xserver.bootTime: Fri Oct 25 07:34:51 2013
> xserver.configfile: default
> xserver.errors:
>
> xserver.logfile: /var/log/Xorg.0.log
> xserver.outputs:
> product id 826
> vendor LGD
> xserver.version: 2:1.14.3-3ubuntu3
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1244645/+subscriptions
>

--
Thanks,
Jack