** Description changed: + == SRU Justification == + + Impact: The standard ACPI backlight interfaces on this machine fail to + change the screen brightness. There is an alternate interface supported + by the samsung-laptop module that does work, but since userspace prefers + acpi_video the hotkeys and UI for adjusting screen brightness fail to + work. + + Fix: This problem is common enough on Samsung machines that samsung- + laptop contains a dmi list of machines which need the acpi_video + backlight disabled. Add this machine to that list. + + Test Case: Using a driver with the quirk added results in working + backlight controls. Tested on LP#1086921. + + --- + Hello, dear developers of Ubuntu! I want to ask something, that I think is relevant to the Ubuntu: I have a small samsung netbook that requires a custom kernel module to be installed from a ppa (https://launchpad.net/~voria/+archive/ppa) so that fn keys work for backlight brightness adjustment. My question is: can this kernel module and script be installed in the main kernel, so that this annoyance can be avoided? From what I read this is an issue that has plagued samsung laptop owners for several years now. The installed samsung-tools and samsung-backlight fixes this issue. I am willing to help if I can, I just want to have a truly out-of-the-box experience with Gnu/Linux. This problem is present in all distros (that's what I read from the Internet, I have only tried it on *buntu). Thank you in advance. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image (not installed) ProcVersionSignature: Ubuntu 3.2.0-34.53-generic 3.2.33 Uname: Linux 3.2.0-34-generic i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: - **** List of PLAYBACK Hardware Devices **** - card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] - Subdevices: 1/1 - Subdevice #0: subdevice #0 + **** List of PLAYBACK Hardware Devices **** + card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] + Subdevices: 1/1 + Subdevice #0: subdevice #0 ApportVersion: 2.0.1-0ubuntu15 Architecture: i386 ArecordDevices: - **** List of CAPTURE Hardware Devices **** - card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] - Subdevices: 1/1 - Subdevice #0: subdevice #0 + **** List of CAPTURE Hardware Devices **** + card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] + Subdevices: 1/1 + Subdevice #0: subdevice #0 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: martin 1564 F.... xfce4-volumed - martin 1571 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: martin 1564 F.... xfce4-volumed + martin 1571 F.... pulseaudio Card0.Amixer.info: - Card hw:0 'Intel'/'HDA Intel at 0xf0400000 irq 47' - Mixer name : 'Realtek ALC269' - Components : 'HDA:10ec0269,144dc08f,00100004' - Controls : 18 - Simple ctrls : 10 + Card hw:0 'Intel'/'HDA Intel at 0xf0400000 irq 47' + Mixer name : 'Realtek ALC269' + Components : 'HDA:10ec0269,144dc08f,00100004' + Controls : 18 + Simple ctrls : 10 Date: Wed Dec 5 20:07:50 2012 HibernationDevice: RESUME=UUID=1144cf36-8c2f-4124-943f-4684e409a192 InstallationMedia: Xubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3) MachineType: SAMSUNG ELECTRONICS CO., LTD. N250P MarkForUpload: True ProcEnviron: - LANGUAGE=en_US:en - TERM=xterm - PATH=(custom, no user) - LANG=en_US.UTF-8 - SHELL=/bin/bash + LANGUAGE=en_US:en + TERM=xterm + PATH=(custom, no user) + LANG=en_US.UTF-8 + SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-34-generic root=UUID=0379bcf6-d023-4729-b527-0d75ccfbe3e0 ro quiet splash vt.handoff=7 RelatedPackageVersions: - linux-restricted-modules-3.2.0-34-generic N/A - linux-backports-modules-3.2.0-34-generic N/A - linux-firmware 1.79.1 + linux-restricted-modules-3.2.0-34-generic N/A + linux-backports-modules-3.2.0-34-generic N/A + linux-firmware 1.79.1 RfKill: - 0: phy0: Wireless LAN - Soft blocked: no - Hard blocked: no + 0: phy0: Wireless LAN + Soft blocked: no + Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/09/2010 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: 01HG.M011.20101209.RHU dmi.board.asset.tag: SAMSUNG dmi.board.name: N250P 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.:bvr01HG.M011.20101209.RHU:bd12/09/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnN250P:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnN250P:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A: dmi.product.name: N250P dmi.product.version: Not Applicable dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1086921 Title: [SAMSUNG N250P] acpi_video backlight doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1086921/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
