Abdurrahman Çarkacıoğlu, could you please confirm this issue exists with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ . If the issue remains, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:
apport-collect -p linux <replace-with-bug-number> Also, 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 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. If this bug is fixed in the mainline kernel, please add the following tags: kernel-fixed-upstream kernel-fixed-upstream-VERSION-NUMBER where VERSION-NUMBER is the version number of the kernel you tested. For example: kernel-fixed-upstream-v3.11-rc3 This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag: needs-upstream-testing If the mainline kernel does not fix this bug, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-VERSION-NUMBER As well, please remove the tag: needs-upstream-testing If you are unable to test the mainline kernel, please comment as to why specifically you were unable to test it and add the following tags: kernel-unable-to-test-upstream kernel-unable-to-test-upstream-VERSION-NUMBER Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding. ** Tags removed: kernel-bug-exists-upstream ** Tags added: kernel-bug-exists-upstream-v3.8-rc6 needs-upstream-testing regression-potential ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1115555 Title: Backlight control does not work, but there are entries in /sys/class/backlight. Status in The Linux Kernel: New Status in “linux” package in Ubuntu: Incomplete Bug description: Backlight control does not work, but there are entries in /sys/class/backlight. This may require the ACPI backlight driver to not take control so that a vendor specific driver will have a chance to register. I wanto mention that this goes beyond just the applet not working. My data does change in Ubuntu for those entries and the acpi interface to the Linux Kernel is not able to use that changed data to change the hardware brightness setting. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-37-generic 3.2.0-37.58 ProcVersionSignature: Ubuntu 3.2.0-37.58-generic 3.2.35 Uname: Linux 3.2.0-37-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu17.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: carkaci 1936 F.... pulseaudio /dev/snd/controlC0: carkaci 1936 F.... pulseaudio CRDA: country AW: (2402 - 2482 @ 40), (N/A, 20) (5170 - 5250 @ 40), (N/A, 20) (5250 - 5330 @ 40), (N/A, 20), DFS (5490 - 5710 @ 40), (N/A, 27), DFS Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xd0500000 irq 48' Mixer name : 'Cirrus Logic CS4206' Components : 'HDA:10134206,106b1800,00100301' Controls : 25 Simple ctrls : 11 Card1.Amixer.info: Card hw:1 'Generic'/'HD-Audio Generic at 0xd0440000 irq 49' Mixer name : 'ATI R6xx HDMI' Components : 'HDA:1002aa01,00aa0100,00100200' Controls : 6 Simple ctrls : 1 Card1.Amixer.values: Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Date: Mon Feb 4 21:53:10 2013 HibernationDevice: RESUME=UUID=2850be5d-9902-4a6d-8e97-3f9d34028e02 InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: Apple Inc. iMac11,3 MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-37-generic root=UUID=83592388-7d5b-432f-94fe-74542604df39 ro acpi_osi=Linux quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/carkaci not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.2.0-37-generic N/A linux-backports-modules-3.2.0-37-generic N/A linux-firmware 1.79.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/03/10 dmi.bios.vendor: Apple Inc. dmi.bios.version: IM112.88Z.0057.B00.1005031455 dmi.board.name: Mac-F2238BAE dmi.board.vendor: Apple Inc. dmi.board.version: iMac11,3 dmi.chassis.type: 13 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-F2238BAE dmi.modalias: dmi:bvnAppleInc.:bvrIM112.88Z.0057.B00.1005031455:bd05/03/10:svnAppleInc.:pniMac11,3:pvr1.0:rvnAppleInc.:rnMac-F2238BAE:rvriMac11,3:cvnAppleInc.:ct13:cvrMac-F2238BAE: dmi.product.name: iMac11,3 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. 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