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[Bug 1504220] Re: Black screen after "prime-select nvidia" and restart of lightdm/reboot

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** Description changed:

- I'm using a Lenovo laptop with an intel/nvidia Optimus compatible graphics solution. While being able to use prime-select to switch between those cards with Ubuntu 14.X and official nvidia drivers it stopped working when switching to ubuntu 15.04 and newer drivers. I'm not sure when the problem first arises, but I'm stucking with it for almost 5 month.
- In the meanwhile I stumbled upon errors in xorg.log pointing to insufficient permissions related to DRM and intel driver. I switched to a newer kernel 4.1.x and the xorg.log error had gone, but the general problem remains.
- A month ago I switched to a 15.10 daily build to test if the bug still exists there. I did a fresh install but the problem is still the same.
+ Being able to use prime-select to switch between graphics cards stopped
+ working when I installed Ubuntu 15.04 with newer drivers.
+ 
+ This worked in Trusty when I used:
+ - nvidia-346
+ - nvidia-346-updates
+ - nvidia-352 (ppa:graphics-drivers/ppa)
  
  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: xorg 1:7.7+7ubuntu4
  ProcVersionSignature: Ubuntu 4.2.0-14.16-generic 4.2.2
  Uname: Linux 4.2.0-14-generic x86_64
  NonfreeKernelModules: nvidia
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  355.11  Wed Aug 26 16:35:41 PDT 2015
   GCC version:  gcc version 5.2.1 20151003 (Ubuntu 5.2.1-21ubuntu2)
  ApportVersion: 2.19-0ubuntu1
  Architecture: amd64
  Date: Thu Oct  8 18:18:55 2015
  DistUpgraded: Fresh install
  DistroCodename: wily
  DistroVariant: ubuntu
  DkmsStatus:
   bbswitch, 0.7, 4.2.0-10-generic, x86_64: installed
   bbswitch, 0.7, 4.2.0-14-generic, x86_64: installed
   nvidia-355, 355.11, 4.2.0-14-generic, x86_64: installed
  GraphicsCard:
   Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:21fc]
   NVIDIA Corporation GF108M [GeForce GT 620M] [10de:0de8] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:21fc]
  InstallationDate: Installed on 2015-09-12 (26 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150911)
  MachineType: LENOVO 33643EG
  ProcEnviron:
   LC_CTYPE=de_DE.UTF-8
   TERM=linux
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/usr/bin/zsh
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-14-generic.efi.signed root=UUID=55cf0b06-9493-479a-a524-07e52d5be60a ro noprompt persistent quiet splash vt.handoff=7
  SourcePackage: xorg
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/09/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GAETA0WW (2.60 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 33643EG
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGAETA0WW(2.60):bd04/09/2015:svnLENOVO:pn33643EG:pvrThinkPadS430:rvnLENOVO:rn33643EG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 33643EG
  dmi.product.version: ThinkPad S430
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.12.2+15.10.20151002-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.64-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.0-1ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.0-1ubuntu1
  version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu3
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
  xserver.bootTime: Thu Oct  8 18:15:17 2015
  xserver.configfile: /etc/X11/xorg.conf
  xserver.errors:
  
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.17.2-1ubuntu9

-- 
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https://bugs.launchpad.net/bugs/1504220

Title:
  Black screen after "prime-select nvidia" and restart of lightdm/reboot

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Being able to use prime-select to switch between graphics cards
  stopped working when I installed Ubuntu 15.04 with newer drivers.

  This worked in Trusty when I used:
  - nvidia-346
  - nvidia-346-updates
  - nvidia-352 (ppa:graphics-drivers/ppa)

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: xorg 1:7.7+7ubuntu4
  ProcVersionSignature: Ubuntu 4.2.0-14.16-generic 4.2.2
  Uname: Linux 4.2.0-14-generic x86_64
  NonfreeKernelModules: nvidia
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  355.11  Wed Aug 26 16:35:41 PDT 2015
   GCC version:  gcc version 5.2.1 20151003 (Ubuntu 5.2.1-21ubuntu2)
  ApportVersion: 2.19-0ubuntu1
  Architecture: amd64
  Date: Thu Oct  8 18:18:55 2015
  DistUpgraded: Fresh install
  DistroCodename: wily
  DistroVariant: ubuntu
  DkmsStatus:
   bbswitch, 0.7, 4.2.0-10-generic, x86_64: installed
   bbswitch, 0.7, 4.2.0-14-generic, x86_64: installed
   nvidia-355, 355.11, 4.2.0-14-generic, x86_64: installed
  GraphicsCard:
   Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:21fc]
   NVIDIA Corporation GF108M [GeForce GT 620M] [10de:0de8] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:21fc]
  InstallationDate: Installed on 2015-09-12 (26 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150911)
  MachineType: LENOVO 33643EG
  ProcEnviron:
   LC_CTYPE=de_DE.UTF-8
   TERM=linux
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/usr/bin/zsh
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-14-generic.efi.signed root=UUID=55cf0b06-9493-479a-a524-07e52d5be60a ro noprompt persistent quiet splash vt.handoff=7
  SourcePackage: xorg
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/09/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GAETA0WW (2.60 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 33643EG
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGAETA0WW(2.60):bd04/09/2015:svnLENOVO:pn33643EG:pvrThinkPadS430:rvnLENOVO:rn33643EG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 33643EG
  dmi.product.version: ThinkPad S430
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.12.2+15.10.20151002-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.64-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.0-1ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.0-1ubuntu1
  version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu3
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
  xserver.bootTime: Thu Oct  8 18:15:17 2015
  xserver.configfile: /etc/X11/xorg.conf
  xserver.errors:

  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.17.2-1ubuntu9

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