Public bug reported: Hello,
see $SUBJECT. By default the screen is very dark and almost unreadable. The Fn+F6/7 hotkeys show the brightness applet but don't change the brightness. Attached info according to https://wiki.ubuntu.com/Kernel/Debugging/Backlight below. Adding "acpi_backlight=vendor" as suggested boot parameters fixes this bug, but this requires manual GRUB configuration (not suitable for non- experts). Regards Jens ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-41-generic-pae 3.2.0-41.66 ProcVersionSignature: Ubuntu 3.2.0-41.66-generic-pae 3.2.42 Uname: Linux 3.2.0-41-generic-pae i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu17.2 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 1655 F.... pulseaudio Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xc4820000 irq 50' Mixer name : 'Intel CougarPoint HDMI' Components : 'HDA:10ec0269,11790628,00100100 HDA:80862805,11790001,00100000' Controls : 29 Simple ctrls : 11 Date: Thu May 9 12:14:51 2013 HibernationDevice: RESUME=UUID=add8fe24-1f1e-4ca7-a2d6-a0f40c03383f InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423) MachineType: TOSHIBA TECRA R850 MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-41-generic-pae root=UUID=ffc754ea-32ed-4ae7-b471-bca82bd54afb ro elevator=deadline quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-41-generic-pae N/A linux-backports-modules-3.2.0-41-generic-pae N/A linux-firmware 1.79.4 SourcePackage: linux StagingDrivers: mei UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/25/2011 dmi.bios.vendor: TOSHIBA dmi.bios.version: Version 3.10 dmi.board.asset.tag: 0000000000 dmi.board.name: Portable PC dmi.board.vendor: TOSHIBA dmi.board.version: Version A0 dmi.chassis.asset.tag: 0000000000 dmi.chassis.type: 10 dmi.chassis.vendor: TOSHIBA dmi.chassis.version: Version 1.0 dmi.modalias: dmi:bvnTOSHIBA:bvrVersion3.10:bd08/25/2011:svnTOSHIBA:pnTECRAR850:pvrPT525E-043021GH:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0: dmi.product.name: TECRA R850 dmi.product.version: PT525E-043021GH dmi.sys.vendor: TOSHIBA ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug backlight i386 notebook precise running-unity staging toshiba ** Attachment added: "backlight-bug-ubuntu.tar.bz2" https://bugs.launchpad.net/bugs/1178205/+attachment/3670841/+files/backlight-bug-ubuntu.tar.bz2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1178205 Title: Screen brightness not changable via applet or hotkeys in Ubuntu 12.04 on Toshiba R850 notebook To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1178205/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
