** Description changed: Failed to adjust brightness. Unable to change brightness with hotkeys or even system settings. - Additional information: There are two backlight interfaces and the system seems to use the wrong one. /sys/class/backlight$ ls acpi_video0 intel_backlight + + Following commands proof that intel interfaces can controll the backlight: + sudo sh -c "echo 2500 >> /sys/class/backlight/intel_backlight/brightness" + ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xorg 1:7.7+1ubuntu8.1 ProcVersionSignature: Ubuntu 3.13.0-65.106-generic 3.13.11-ckt26 Uname: Linux 3.13.0-65-generic x86_64 .tmp.unity.support.test.0: - + ApportVersion: 2.14.1-0ubuntu3.15 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: Tue Oct 6 15:25:21 2015 DistUpgraded: Fresh install DistroCodename: trusty DistroVariant: ubuntu ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: - Intel Corporation ValleyView Gen7 [8086:0f31] (rev 0e) (prog-if 00 [VGA controller]) - Subsystem: Dell Device [1028:06d7] + Intel Corporation ValleyView Gen7 [8086:0f31] (rev 0e) (prog-if 00 [VGA controller]) + Subsystem: Dell Device [1028:06d7] InstallationDate: Installed on 2015-10-05 (0 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: Dell Inc. Inspiron 5551 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-65-generic.efi.signed root=UUID=2e69c3f8-b60b-4e26-beed-33717212e1e9 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/28/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: X16 dmi.board.asset.tag: AFTPASS dmi.board.name: Type2 - Board Product Name1 dmi.board.vendor: Dell Inc. dmi.board.version: Type2 - Board Version dmi.chassis.asset.tag: AFTPASS dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: X16 dmi.modalias: dmi:bvnDellInc.:bvrX16:bd01/28/2015:svnDellInc.:pnInspiron5551:pvrX16:rvnDellInc.:rnType2-BoardProductName1:rvrType2-BoardVersion:cvnDellInc.:ct8:cvrX16: dmi.product.name: Inspiron 5551 dmi.product.version: X16 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.11.3+14.04.20150313-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.60-2~ubuntu14.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.4 version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.7 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.6 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 xserver.bootTime: Tue Oct 6 14:20:56 2015 xserver.configfile: default xserver.errors: - + xserver.logfile: /var/log/Xorg.0.log xserver.outputs: - product id 5100 - vendor AUO + product id 5100 + vendor AUO xserver.version: 2:1.15.1-0ubuntu2.7
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1503168 Title: [Dell Inspiron 5551][8086:0f31] Unable to adjust brightness To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1503168/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
