* Reboot with only the kernel parameter acpi_backlight=vendor : * Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. That did not work.
* ls /sys/class/backlight > vendorbacklight See attachments. * If you have the folder /sys/class/backlight/intel_backlight/ : * type sudo su , and then execute: * ls -la /sys/class/backlight/intel_backlight/ > lslabacklight See attachments. * echo 8 > /sys/class/backlight/intel_backlight/brightness Screen became almost black, and I had to reboot, as I wasn't seeing anthing . -- 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/1329510 Title: Backlight setting on Asus X200M Status in “linux” package in Ubuntu: Confirmed Bug description: Backlight setting is not working with Lubuntu 14.04. This bug is reported following https://wiki.ubuntu.com/Kernel/Debugging/Backlight#Debugging_information_to_provide_in_your_bug_report guidelines. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-29-generic 3.13.0-29.53 ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2 Uname: Linux 3.13.0-29-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: guillaume 1447 F.... lxpanel CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type: 'iw' CurrentDesktop: LXDE Date: Thu Jun 12 21:52:16 2014 HibernationDevice: RESUME=UUID=5b0a59aa-0acf-415f-93bd-62df1b558efb InstallationDate: Installed on 2014-06-12 (0 days ago) InstallationMedia: Lubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB Bus 001 Device 002: ID 0bda:5603 Realtek Semiconductor Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: ASUSTeK COMPUTER INC. X200MA ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=37551324-2550-4e13-aea9-4603fbd63807 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-29-generic N/A linux-backports-modules-3.13.0-29-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/21/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: X200MA.302 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: X200MA 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.:bvrX200MA.302:bd01/21/2014:svnASUSTeKCOMPUTERINC.:pnX200MA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX200MA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: X200MA dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1329510/+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