Ed Mente, 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-rc4 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-v3.7 needs-full-computer-model needs-upstream-testing ** Tags removed: needs-full-computer-model ** Tags added: latest-bios-08ji -- 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/1092517 Title: [Samsung N220] Cannot control backlight using the keyboard keys on Ubuntu Server Status in “linux” package in Ubuntu: Confirmed Bug description: The problem appears in console mode only and it is that the backlight cannot be controlled with the Fn keys. It can neither be adjusted nor turned off. The machine runs Ubuntu Server 12.04.1 LTS and is Samsung N220 netbook with a sun readable PixelQi display. uname -a : Linux clterm 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux ls /sys/class/backlight : intel_backlight samsung I have put acpi_backlight=vendor kernel parameter as setting acpi video backlight does not have any effect. This works ok: echo 200 |sudo dd of=/sys/class/backlight/intel_backlight/brightness This also works ok: echo 4 |sudo dd of=/sys/class/backlight/samsung/brightness The above commands work differently though. The first one allows controlling in great ranges, while the second controls the backlight within some bounds. With acpi=off, the Fn keys function correctly in the console. Your help is appreciated! --- AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.0.1-0ubuntu15.1 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Error: [Errno 2] No such file or directory Card0.Amixer.values: Error: [Errno 2] No such file or directory DistroRelease: Ubuntu 12.04 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=5222a4fe-9efb-4de0-823d-82a44027cb1f InstallationMedia: Ubuntu-Server 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120817.3) MachineType: SAMSUNG ELECTRONICS CO., LTD. N150/N210/N220 MarkForUpload: True Package: linux (not installed) ProcEnviron: TERM=linux PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-29-generic root=UUID=a357370c-979e-45c4-954b-0d62b3dc9df5 ro acpi_backlight=vendor ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24 RelatedPackageVersions: linux-restricted-modules-3.2.0-29-generic N/A linux-backports-modules-3.2.0-29-generic N/A linux-firmware 1.79.1 RfKill: Error: [Errno 2] No such file or directory Tags: precise Uname: Linux 3.2.0-29-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 03/25/2010 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: 08JI.M073.20100325.JIP dmi.board.asset.tag: SAMSUNG dmi.board.name: N150/N210/N220 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr08JI.M073.20100325.JIP:bd03/25/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnN150/N210/N220:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnN150/N210/N220:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A: dmi.product.name: N150/N210/N220 dmi.product.version: Not Applicable dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. 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