** Tags removed: backlight kernel -- 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/1138168
Title: 8086:0106 Backlight control regression Status in The Linux Kernel: Incomplete Status in “linux” package in Ubuntu: Triaged Bug description: Laptop: ASUS A54C-NB91 with BIOS version 210 After the 3.6 kernel controlling the backlight via software (like xbacklight and the brightness applet) no longer works as intended (attempting to get brightness alters the brightness). This was not a Issue on the older BIOS version (207), but downgrading that is not possible, and ASUS will not fix it stating the typical we don't support linux on this model On the 3.6 kernel with the latest BIOS the backlight can't be controlled via the fn+brightness keys, that still works on the 3.7 kernel and up i have never had the fn+brightness keys ever update /sys/class/backlight/acpi_video0/brightness under any tested scenario. I have tested Kernel versions 3.8.1-030801, 3.8.0-8, 3.7.10-030710, and 3.6.11-030611 today on raring without acpi_backlight=vendor. I had the exact same results as when i did the test earlier in raring and quantal (see PDF file in attachment). The attachment contains the following files (all system generated files are from this install) Detailed test.pdf dmesg_3.6.11-030611-generic dmesg_3.7.10-030710-generic dmesg_3.8.0-8-generic dmesg_3.8.1-030801-generic lspci_very_verbose syslog WORKAROUND: One may choose a value from 0 (completely off) to 4882 (100%) works in increments of 2: echo 100 | sudo tee /sys/class/backlight/intel_backlight/brightness ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: linux-image-3.8.0-8-generic 3.8.0-8.17 ProcVersionSignature: Ubuntu 3.8.0-8.17-generic 3.8.0 Uname: Linux 3.8.0-8-generic x86_64 ApportVersion: 2.9-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: chad 1708 F.... xfce4-volumed chad 1722 F.... pulseaudio /dev/snd/pcmC0D0p: chad 1722 F...m pulseaudio CurrentDmesg: Date: Fri Mar 1 11:31:52 2013 HibernationDevice: RESUME=UUID=a974f07b-dcae-4886-8ddb-e5a48219f891 InstallationDate: Installed on 2013-03-01 (0 days ago) InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130301) MachineType: ASUSTeK Computer Inc. K54C MarkForUpload: True ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-8-generic root=UUID=5c6a915b-d2e5-4746-9c09-657e51145ad6 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.8.0-8-generic N/A linux-backports-modules-3.8.0-8-generic N/A linux-firmware 1.103 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/23/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: K54C.210 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: K54C dmi.board.vendor: ASUSTeK Computer Inc. dmi.board.version: 1.0 dmi.chassis.asset.tag: ATN12345678901234567 dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK Computer Inc. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrK54C.210:bd10/23/2012:svnASUSTeKComputerInc.:pnK54C:pvr1.0:rvnASUSTeKComputerInc.:rnK54C:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0: dmi.product.name: K54C dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK Computer Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1138168/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
