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[Manvydas <manwiuxas@xxxxxxxxx>]

Public bug reported:

Using latest Ubuntu Gnome x64 daily build with all updates installed. 
Lenovo Z70-80 laptop with Nvidia 840M, BIOS updated to latest version, secure boot and other potentially problematic BIOS settings disabled.

Can only see a black screen instead of a log-in screen after boot completes when proprietary Nvidia drivers are installed.
Regular Ubuntu works absolutely fine on the same machine with the same driver version. Attempting to use older drivers on Ubuntu Gnome made no difference.

Bug is affecting more than just me. We were talking about workarounds in
ubuntuforums. User fthx claims that switching to lightdm fixes the issue
http://ubuntuforums.org/showthread.php?t=2317628&p=13457703#post13457703

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-14-generic 4.4.0-14.30
ProcVersionSignature: Ubuntu 4.4.0-14.30-generic 4.4.5
Uname: Linux 4.4.0-14-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
Date: Sat Mar 19 23:19:21 2016
HibernationDevice: RESUME=UUID=4f8fb76c-f99d-4c54-8a67-eed0653d8eb6
InstallationDate: Installed on 2016-03-19 (0 days ago)
InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160318)
MachineType: LENOVO 80FG
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-14-generic.efi.signed root=UUID=572a19f6-7324-4269-ad36-7ffc9919f7a2 ro noprompt persistent quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-14-generic N/A
 linux-backports-modules-4.4.0-14-generic  N/A
 linux-firmware                            1.156
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/22/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: ABCN96WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Lenovo Z70-80
dmi.board.vendor: LENOVO
dmi.board.version: NO DPK
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Z70-80
dmi.modalias: dmi:bvnLENOVO:bvrABCN96WW:bd09/22/2015:svnLENOVO:pn80FG:pvrLenovoZ70-80:rvnLENOVO:rnLenovoZ70-80:rvrNODPK:cvnLENOVO:ct10:cvrLenovoZ70-80:
dmi.product.name: 80FG
dmi.product.version: Lenovo Z70-80
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

-- 
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/1559576

Title:
  Ubuntu Gnome boots to black screen when using proprietary Nvidia
  drivers on a laptop with Optimus

Status in linux package in Ubuntu:
  New

Bug description:
  Using latest Ubuntu Gnome x64 daily build with all updates installed. 
  Lenovo Z70-80 laptop with Nvidia 840M, BIOS updated to latest version, secure boot and other potentially problematic BIOS settings disabled.

  Can only see a black screen instead of a log-in screen after boot completes when proprietary Nvidia drivers are installed.
  Regular Ubuntu works absolutely fine on the same machine with the same driver version. Attempting to use older drivers on Ubuntu Gnome made no difference.

  Bug is affecting more than just me. We were talking about workarounds
  in ubuntuforums. User fthx claims that switching to lightdm fixes the
  issue
  http://ubuntuforums.org/showthread.php?t=2317628&p=13457703#post13457703

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-14-generic 4.4.0-14.30
  ProcVersionSignature: Ubuntu 4.4.0-14.30-generic 4.4.5
  Uname: Linux 4.4.0-14-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  Date: Sat Mar 19 23:19:21 2016
  HibernationDevice: RESUME=UUID=4f8fb76c-f99d-4c54-8a67-eed0653d8eb6
  InstallationDate: Installed on 2016-03-19 (0 days ago)
  InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160318)
  MachineType: LENOVO 80FG
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-14-generic.efi.signed root=UUID=572a19f6-7324-4269-ad36-7ffc9919f7a2 ro noprompt persistent quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-14-generic N/A
   linux-backports-modules-4.4.0-14-generic  N/A
   linux-firmware                            1.156
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/22/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: ABCN96WW
  dmi.board.asset.tag: NO Asset Tag
  dmi.board.name: Lenovo Z70-80
  dmi.board.vendor: LENOVO
  dmi.board.version: NO DPK
  dmi.chassis.asset.tag: NO Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo Z70-80
  dmi.modalias: dmi:bvnLENOVO:bvrABCN96WW:bd09/22/2015:svnLENOVO:pn80FG:pvrLenovoZ70-80:rvnLENOVO:rnLenovoZ70-80:rvrNODPK:cvnLENOVO:ct10:cvrLenovoZ70-80:
  dmi.product.name: 80FG
  dmi.product.version: Lenovo Z70-80
  dmi.sys.vendor: LENOVO

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