Juan Manuel, thank you for reporting this and helping make Ubuntu better. As per http://support.lenovo.com/us/en/products/Laptops-and- netbooks/IdeaPad-U-Series- laptops/IdeaPad-U310?linkTrack=Homepage:Body_Search%20Products an update to your computer's buggy and outdated BIOS is available (65CN99WW). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it change anything?
For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. As well, you don't have to create a new bug report. Once the BIOS is updated, if the problem is still reproducible: 1) Please provide the output of the following terminal command (not perform an apport-collect): sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date 2) Please make a comment specifically advising on if there was an improvement or not. 3) Please mark this report Status New. If it's not reproducible, please mark this as Invalid. Thank you for your understanding. ** Tags added: bios-outdated-65cn99ww ** Changed in: xorg (Ubuntu) Importance: Undecided => Low ** Changed in: xorg (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1529154 Title: Brightness control does not work Status in xorg package in Ubuntu: Incomplete Bug description: The brightness level of the screen does not change, despite of using the control brightness keys in the keyboard, or the control in "Brightness & Lock" in the "System Settings". ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xorg 1:7.7+1ubuntu8.1 ProcVersionSignature: Ubuntu 3.19.0-42.48~14.04.1-generic 3.19.8-ckt10 Uname: Linux 3.19.0-42-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.14.1-0ubuntu3.11 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 CurrentDesktop: Unity Date: Thu Dec 24 15:25:11 2015 DistUpgraded: Fresh install DistroCodename: trusty DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:3903] InstallationDate: Installed on 2015-12-24 (0 days ago) InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) MachineType: LENOVO IdeaPad U310 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-42-generic root=UUID=04718e80-4365-408d-a771-8af3458df9cb ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/04/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: 65CN89WW dmi.board.asset.tag: No Asset Tag dmi.board.name: Lenovo dmi.board.vendor: LENOVO dmi.board.version: 31900004WIN8 STD SGL dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo U310 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr65CN89WW:bd09/04/2012:svnLENOVO:pnIdeaPadU310:pvrLenovoU310:rvnLENOVO:rnLenovo:rvr31900004WIN8STDSGL:cvnLENOVO:ct10:cvrLenovoU310: dmi.product.name: IdeaPad U310 dmi.product.version: Lenovo U310 dmi.sys.vendor: LENOVO 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 N/A version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core N/A version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A xserver.bootTime: Thu Dec 24 15:21:58 2015 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 4140 vendor AUO xserver.version: 2:1.17.1-0ubuntu3~trusty1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1529154/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp