I found that the brightness controls (via function key or sliders in power management) were changing the values in /sys/class/backlight/acpi_videos0/brightness, but nothing changed in /sys/class/backlight/intel_backlight/brightness. When I edited the value in /sys/class/backlight/intel_backlight/brightness the display backlight brightness did change. I also found that the display brightness could be changed in a unity session, (although not by function key).
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1724933 Title: I can't adjust display brightness Status in xorg package in Ubuntu: Confirmed Bug description: I'm using HP Pavilion DV6. After upgrade to Ubuntu 17.10 from 17.04 I can't adjust display brightness. when I press F2|F3 keys icon brightness appears, the controller moves but the brightness doesn't change. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: xorg 1:7.7+19ubuntu3 ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 Uname: Linux 4.13.0-16-generic x86_64 NonfreeKernelModules: wl .tmp.unity_support_test.0: ApportVersion: 2.20.7-0ubuntu3 Architecture: amd64 CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Thu Oct 19 22:14:51 2017 DistUpgraded: 2017-10-19 21:15:33,861 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' DistroCodename: artful DistroVariant: ubuntu DkmsStatus: bcmwl, 6.30.223.271+bdcom, 4.10.0-37-generic, x86_64: installed bcmwl, 6.30.223.271+bdcom, 4.13.0-16-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company 2nd Generation Core Processor Family Integrated Graphics Controller [103c:3388] Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6730M/6770M/7690M XT] [1002:6740] (rev ff) (prog-if ff) InstallationDate: Installed on 2017-06-18 (123 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) MachineType: Hewlett-Packard HP Pavilion dv6 Notebook PC ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-16-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to artful on 2017-10-19 (0 days ago) dmi.bios.date: 04/25/2011 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: F.13 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 3388 dmi.board.vendor: Hewlett-Packard dmi.board.version: 10.25 dmi.chassis.asset.tag: Chassis Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnHewlett-Packard:bvrF.13:bd04/25/2011:svnHewlett-Packard:pnHPPaviliondv6NotebookPC:pvr058F110000244710000610100:rvnHewlett-Packard:rn3388:rvr10.25:cvnHewlett-Packard:ct10:cvrChassisVersion: dmi.product.family: 103C_5335KV G=N L=CON B=HP S=PAV dmi.product.name: HP Pavilion dv6 Notebook PC dmi.product.version: 058F110000244710000610100 dmi.sys.vendor: Hewlett-Packard version.compiz: compiz 1:0.9.13.1+17.10.20170901-0ubuntu1 version.libdrm2: libdrm2 2.4.83-1 version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.2-0ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.2-0ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.5-0ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1724933/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
