Public bug reported: I use this laptop since 10.04 and I always have to write something into /etc/default/grub, to solve this problem. Now on precise it is properly working if I write "acpi_backlight=vendor" to this line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" Is it possible to fix this bug, to work the brightness change out of the box? I really hope it is. It doesn't work since 2009.06.27. These are the bugs which is connected to this problem: https://bugs.launchpad.net/ubuntu/+source/acpid/+bug/392948 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/489041 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/518002 https://bugs.launchpad.net/ubuntu/+bug/773820 I hope I attached everything which necessary, if not please let me know what I should send.
ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-17-generic-pae 3.2.0-17.27 ProcVersionSignature: Ubuntu 3.2.0-17.27-generic-pae 3.2.6 Uname: Linux 3.2.0-17-generic-pae i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.93-0ubuntu2 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: lukibeni 1665 F.... pulseaudio /dev/snd/pcmC0D0p: lukibeni 1665 F...m pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf0700000 irq 45' Mixer name : 'Conexant CX20561 (Hermosa)' Components : 'HDA:14f15051,10250253,00100000' Controls : 18 Simple ctrls : 12 Date: Sun Feb 26 09:19:11 2012 HibernationDevice: RESUME=UUID=9e4f77a4-98e9-48ec-97e5-07dc5ae08872 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120201.1) MachineType: Acer Extensa 5235 ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=hu_HU.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-17-generic-pae root=UUID=5b2cd82c-58ab-45e6-9719-02f98b6c857b ro quiet splash acpi_backlight=vendor vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-17-generic-pae N/A linux-backports-modules-3.2.0-17-generic-pae N/A linux-firmware 1.71 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/09/2009 dmi.bios.vendor: Phoenix dmi.bios.version: V0.3216 dmi.board.name: BA50-MV dmi.board.vendor: Acer dmi.board.version: Not Applicable dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenix:bvrV0.3216:bd06/09/2009:svnAcer:pnExtensa5235:pvrNotApplicable:rvnAcer:rnBA50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A: dmi.product.name: Extensa 5235 dmi.product.version: Not Applicable dmi.sys.vendor: Acer ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 precise -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/941286 Title: Setting brightness doesn't work out of the box on Acer Extensa 5235 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/941286/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs