Alexandr, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, removing your WORKAROUND, could you provide the information following https://wiki.ubuntu.com/Kernel/Debugging/Backlight ?
As well, removing your WORKAROUND, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the kernel in the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested and remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs- upstream-testing' text. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream-VERSION-NUMBER', where VERSION-NUMBER is the version number of the kernel you tested. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream-VERSION-NUMBER', where VERSION-NUMBER is the version number of the kernel you tested. If you are unable to test the mainline kernel, please comment as to why specifically you were unable to test it and add the tag: 'kernel-unable- to-test-upstream'. Please let us know your results. Thank you for your understanding. Helpful Bug Reporting Links: https://help.ubuntu.com/community/ReportingBugs#Bug_Reporting_Etiquette https://help.ubuntu.com/community/ReportingBugs#A3._Make_sure_the_bug_hasn.27t_already_been_reported https://help.ubuntu.com/community/ReportingBugs#Adding_Apport_Debug_Information_to_an_Existing_Launchpad_Bug https://help.ubuntu.com/community/ReportingBugs#Adding_Additional_Attachments_to_an_Existing_Launchpad_Bug ** Tags added: likely-dup-bug-863156 needs-upstream-testing ** Description changed: Hello, my screen is always set on maximum brightness and I cannot change it. When I press Fn+Left or Right - I see the indicator, changing brightness, but nothing changes. + + WORKAROUND: Open terminal and type: + sudo vi /etc/default/grub + + Look for the following line: + GRUB_CMDLINE_LINUX_DEFAULT=”quite splash“ + + Press insert key for edit mode add “acpi_osi=” to the list as shown below: + GRUB_CMDLINE_LINUX_DEFAULT=”quite splash acpi_osi=” + + Press Esc key and :wq to save the file and run the following command to update the grub: + sudo update-grub + + Reboot your laptop for screen brightness adjustment to work. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-24-generic-pae 3.2.0-24.38 ProcVersionSignature: Ubuntu 3.2.0-24.38-generic-pae 3.2.16 Uname: Linux 3.2.0-24-generic-pae i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu7 Architecture: i386 ArecordDevices: - **** List of CAPTURE Hardware Devices **** - card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog] - Subdevices: 1/1 - Subdevice #0: subdevice #0 + **** List of CAPTURE Hardware Devices **** + card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog] + Subdevices: 1/1 + Subdevice #0: subdevice #0 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: ad 1825 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: ad 1825 F.... pulseaudio Card0.Amixer.info: - Card hw:0 'PCH'/'HDA Intel PCH at 0xc6400000 irq 43' - Mixer name : 'Intel CougarPoint HDMI' - Components : 'HDA:14f1506c,10250574,00100000 HDA:80862805,10250574,00100000' - Controls : 21 - Simple ctrls : 9 + Card hw:0 'PCH'/'HDA Intel PCH at 0xc6400000 irq 43' + Mixer name : 'Intel CougarPoint HDMI' + Components : 'HDA:14f1506c,10250574,00100000 HDA:80862805,10250574,00100000' + Controls : 21 + Simple ctrls : 9 Date: Fri May 11 08:01:40 2012 HibernationDevice: RESUME=UUID=c1695b1b-d510-475c-9fc8-c920602ccd9d InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423) MachineType: Acer TravelMate 5760 ProcEnviron: - TERM=xterm - PATH=(custom, no user) - LANG=ru_RU.UTF-8 - SHELL=/bin/bash + TERM=xterm + PATH=(custom, no user) + LANG=ru_RU.UTF-8 + SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic-pae root=UUID=b83d613b-3bab-4909-92c6-a38ae24cb3f4 ro quiet splash vt.handoff=7 RelatedPackageVersions: - linux-restricted-modules-3.2.0-24-generic-pae N/A - linux-backports-modules-3.2.0-24-generic-pae N/A - linux-firmware 1.79 + linux-restricted-modules-3.2.0-24-generic-pae N/A + linux-backports-modules-3.2.0-24-generic-pae N/A + linux-firmware 1.79 SourcePackage: linux StagingDrivers: rts_pstor mei UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: - + dmi.bios.date: 04/07/2011 dmi.bios.vendor: INSYDE dmi.bios.version: V1.09 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: BAV50_HR dmi.board.vendor: Acer dmi.board.version: Base Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnINSYDE:bvrV1.09:bd04/07/2011:svnAcer:pnTravelMate5760:pvrV1.09:rvnAcer:rnBAV50_HR:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion: dmi.product.name: TravelMate 5760 dmi.product.version: V1.09 dmi.sys.vendor: Acer ** Changed in: linux (Ubuntu) Importance: Medium => Low ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/997901 Title: Acer Travelmate 5760 brightness control does not work (Intel HD Graphics 3000) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/997901/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
