apport information ** Tags added: apport-collected
** Description changed: 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. ** Attachment added: "AcpiTables.txt" https://bugs.launchpad.net/bugs/1092517/+attachment/3464918/+files/AcpiTables.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1092517 Title: Cannot control backlight using the keyboard keys on Ubuntu Server To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1092517/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
