I think this is a system specific issue (it depends on the BIOS). Quoting Bbswitch's documentation:
On some machines, turning off the card is permanent and the card does not reappear on subsequents reboots, which can result into the screen staying black all the time, including the BIOS screen. If it occurs, first try to shutdown, unplug power cord, remove battery, wait 30s, then put everything back in and boot. If it's not solved, then the solution is to reset the BIOS to factory settings. Before executing bbswitch for the first time, it is therefore recommended to take note of the full key sequence in the BIOS to do a reset. source: https://github.com/Bumblebee-Project/bbswitch On shutdown bbswitch is unloaded and should switch the discrete card back on, but apparently this doesn't work on this specific system. ** Changed in: linux (Ubuntu) Status: In Progress => Won't Fix -- 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/1316095 Title: [Nvidia GF117M] 10de:1140 3D Controller disapear after reboot Status in “linux” package in Ubuntu: Won't Fix Status in “nvidia-prime” package in Ubuntu: Invalid Bug description: Unable to switch back to nvidia graphic chip after reboot. Switching graphics does not requires reboot, but it does cause issue when user had to reboot for some reason, and will not able to use nvidia graphic until reboot. Step to reproduce: Switch to intel integrated graphic driver first if you were not, open nvidia settings from dash or use following command: sudo prime-select intel && sudo reboot now Expected result: Able to switch back to nvidia graphic chip using nvidia settings. Actuall result: unable to swich back to nvidia driver, the 3D controller disapeared in pci list. nvidia-settings will give you empty warning prompt, checking from console gives you unkown result: sudo prime-select query unknown WORKAROUND: Shutdown the system then turn on, the 3D controller will be back. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 [modified: boot/vmlinuz-3.13.0-24-generic] ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 1750 F.... pulseaudio CRDA: country TW: (2402 - 2472 @ 40), (3, 27) (5270 - 5330 @ 40), (3, 17), DFS (5735 - 5815 @ 40), (3, 30) CurrentDesktop: Unity Date: Mon May 5 07:02:04 2014 HibernationDevice: RESUME=UUID=c19bacd6-a604-4c9b-9a21-5d0a2d9cef5c InstallationDate: Installed on 2014-04-29 (6 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: Dell Inc. Vostro 5460 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=15cbb6aa-65e8-4596-be71-2ff7431000be ro rootdelay=60 quiet splash initcall_debug RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/04/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A07 dmi.board.name: TIE3C2 dmi.board.vendor: Dell Inc. dmi.board.version: X00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA07:bd09/04/2013:svnDellInc.:pnVostro5460:pvr:rvnDellInc.:rnTIE3C2:rvrX00:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Vostro 5460 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1316095/+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
