Christopher, my notebook is HP ENVY 14-1095LA. However, this bug is solved in kernels 3.11 and upwards, so it is no longer present in Ubuntu 13.10. I don't know about the new kernels in 12.04LTS though. If someone can test it, maybe this bug should be closed.
-- 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/1163418 Title: Backlight is off when switching to discrete AMD GPU using vga_switcheroo and can't be turned on Status in “linux” package in Ubuntu: Incomplete Bug description: I have a MUXed hybrid graphics notebook with Intel Ironlake / AMD HD5650m GPUs and since upgrading to Ubuntu 13.04 (from 12.10) I have been having problems with vga_switcheroo. As stated in bug #1162526 I can't switch to the discrete GPU as I could on 12.10. Using the workaround posted by Vangel Ajanovski in askubuntu (http://askubuntu.com/questions/142506/hybrid-graphics-on- ubuntu-12-04-switching-to-discrete) I can switch to the discrete graphics, but when I do the laptop backlight turns off and I can't turn it on by any method I tried. It does work with an external HDMI display. ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: xorg 1:7.7+1ubuntu4 ProcVersionSignature: Ubuntu 3.8.0-15.25-generic 3.8.4 Uname: Linux 3.8.0-15-generic x86_64 NonfreeKernelModules: wl .tmp.unity.support.test.0: ApportVersion: 2.9.2-0ubuntu5 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDmesg: [ 63.473963] systemd-logind[2294]: New seat seat0. [ 63.474063] systemd-logind[2294]: Failed to save seat data for seat0: No such file or directory [ 64.482886] hda-intel 0000:01:00.1: Disabling via VGA-switcheroo [ 64.600077] hda-intel 0000:01:00.1: Cannot lock devices! [ 64.600083] radeon: switched off Date: Tue Apr 2 13:06:45 2013 DistUpgraded: Fresh install DistroCodename: raring DistroVariant: ubuntu DkmsStatus: bcmwl, 6.20.155.1+bdcom, 3.8.0-15-generic, x86_64: installed ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Device [103c:1436] Advanced Micro Devices [AMD] nee ATI Madison [Radeon HD 5000M Series] [1002:68c1] (rev ff) (prog-if ff) InstallationDate: Installed on 2013-03-30 (2 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130328) MachineType: Hewlett-Packard HP ENVY 14 Notebook PC MarkForUpload: True ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-15-generic root=UUID=67db7fed-d0f3-4c33-9a58-eb3860cfc7be ro quiet splash acpi_osi=Linux fbcon=map:0 vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/01/2011 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: F.26 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 1436 dmi.board.vendor: Hewlett-Packard dmi.board.version: 59.24 dmi.chassis.asset.tag: CNU03538DZ dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnHewlett-Packard:bvrF.26:bd12/01/2011:svnHewlett-Packard:pnHPENVY14NotebookPC:pvr0492100000241910000620000:rvnHewlett-Packard:rn1436:rvr59.24:cvnHewlett-Packard:ct10:cvrChassisVersion: dmi.product.name: HP ENVY 14 Notebook PC dmi.product.version: 0492100000241910000620000 dmi.sys.vendor: Hewlett-Packard version.compiz: compiz 1:0.9.9~daily13.03.29-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.43-0ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.3-0ubuntu1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.3-0ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.5-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1 xserver.bootTime: Tue Apr 2 13:03:38 2013 xserver.configfile: default xserver.errors: RADEON(G0): [XvMC] Failed to initialize extension. xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.13.3-0ubuntu4 xserver.video_driver: intel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1163418/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
