Public bug reported: Labtop HP Pavilion HDX 9150EF with Lubuntu 12.04.4 LTS, Kernel Linux 3.2.0-60-generic (x86_64) has acceptable visual quality but lacks brillance and is somewhat dark.
This is first time Linux is installed on this machine. Open source Radeon drivers installed according to: http://doc.ubuntu- fr.org/radeon XFCE manager does not dim the display. Brightness control created according to: http://www.omgubuntu.co.uk/2013/04/brightness-control-ubuntu return the message "no backlights were found on your system". Grub file changed according to: http://www.refreshit.info/2012/08/solved-brightness-increase-and-decrease.html#.Uzp8ch_I0fA but with no effect. According to reporting Backlight Bugs from https://wiki.ubuntu.com/Kernel/Debugging/Backlight I checked that backlight control does not work and there are no entries in /sys/class/backlight. Therefore it should be an ACPI issue if I understand correctly. Is there a way to activate or manage backlight on this system to recover original brillance? Best regards, Nicolas ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-60-generic 3.2.0-60.91 ProcVersionSignature: Ubuntu 3.2.0-60.91-generic 3.2.55 Uname: Linux 3.2.0-60-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu17.6 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: nicolas 1883 F.... pulseaudio /dev/snd/controlC0: nicolas 1883 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xe8404000 irq 51' Mixer name : 'SigmaTel STAC9271D' Components : 'HDA:83847627,30d4103c,00100201' Controls : 23 Simple ctrls : 12 Card1.Amixer.info: Card hw:1 'HDMI'/'HDA ATI HDMI at 0xe8310000 irq 52' Mixer name : 'ATI R6xx HDMI' Components : 'HDA:1002aa01,00aa0100,00100000' 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: Tue Apr 1 10:42:45 2014 HibernationDevice: RESUME=UUID=30f70a08-6eeb-4713-a061-ec58ec336dc4 InstallationMedia: Lubuntu 12.04 "Precise Pangolin" - Release amd64 (20120423) MachineType: Hewlett-Packard HP Pavilion HDX9000 Notebook PC 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-3.2.0-60-generic root=UUID=5e9ec670-275b-41d9-99b1-9bf72e010269 ro quiet splash pcie_aspm=force acpi_backlight=vendor vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-60-generic N/A linux-backports-modules-3.2.0-60-generic N/A linux-firmware 1.94 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/28/2008 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 68DVD Ver. F.40 dmi.board.name: 30D4 dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 86.17 dmi.chassis.asset.tag: CNU7413YH1 dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr68DVDVer.F.40:bd08/28/2008:svnHewlett-Packard:pnHPPavilionHDX9000NotebookPC:pvrF.40:rvnHewlett-Packard:rn30D4:rvrKBCVersion86.17:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP Pavilion HDX9000 Notebook PC dmi.product.version: F.40 dmi.sys.vendor: Hewlett-Packard ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: amd64 apport-bug precise third-party-packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1300689 Title: No backlight found on system with Lubuntu 12.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1300689/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
