Successfully installed the latest 4.4 kernel and can confirm that the problem persists. I would like to point out another bug most likely related to it.
When resuming from stand-by the keyboard backlight is off and screen is on full power i.e. not restored from when computer went to sleep. When pressing the shortcut buttons to change backlight or screen brightness it immediately switches to the last configuration, from 0 to 50 % for example. Should I report it as a separate bug? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1506914 Title: Screen brightness not working using keyboard shortcut fn+F5/F6 not working. Status in linux package in Ubuntu: Incomplete Bug description: The fix is editing /etc/default/grub and replacing GRUB_CMDLINE_LINUX_DEFAULT="" with GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" run $ sudo update-grub reboot ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: xorg 1:7.7+7ubuntu4 ProcVersionSignature: Ubuntu 3.19.0-30.34-generic 3.19.8-ckt6 Uname: Linux 3.19.0-30-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.17.2-0ubuntu1.5 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: Fri Oct 16 17:27:47 2015 DistUpgraded: Fresh install DistroCodename: vivid DistroVariant: ubuntu DkmsStatus: bbswitch, 0.7, 3.19.0-30-generic, x86_64: installed ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device [1043:11cd] Subsystem: ASUSTeK Computer Inc. Device [1043:11cd] JournalErrors: Error: command ['journalctl', '-b', '--priority', 'warning'] failed with exit code 1: No journal files were found. MachineType: ASUSTeK COMPUTER INC. G550JK ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-30-generic.efi.signed root=UUID=9a6cce6e-ddfb-40c7-a64c-823140602164 ro quiet splash acpi_backlight=vendor vt.handoff=7 SourcePackage: xorg Symptom: display UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/11/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: G550JK.204 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: G550JK dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrG550JK.204:bd08/11/2014:svnASUSTeKCOMPUTERINC.:pnG550JK:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnG550JK:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: G550JK dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.60-2 version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.9-2ubuntu1~vivid2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.9-2ubuntu1~vivid2 version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1 xserver.bootTime: Sat Oct 10 11:46:59 2015 xserver.configfile: default xserver.errors: Failed to load module "nvidia" (module does not exist, 0) Failed to load module "nvidia" (module does not exist, 0) NOUVEAU(G0): [GLAMOR] failed to initialise EGL NOUVEAU(G0): Error creating GPU channel: -19 NOUVEAU(G0): Error initialising acceleration. Falling back to NoAccel xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 12876 vendor SDC xserver.version: 2:1.17.1-0ubuntu3.1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1506914/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
