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[Johnny Arthur <1574732@xxxxxxxxxxxxxxxxxx>]

The problem seems to be due to uefi secure boot option now checking also the keys of modules, which the nvidia driver obviously does not provide. Disabling secure boot solved the problem for me, but completely disabling it just because there is no signature for the nvidia driver seems to be a really bad option!
Shouldn't there be an option to install signatures for third party drivers, that are supported (nvidia, virtualbox etc)?
I think this bug rather affects the package 'shim'...

** Also affects: shim
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1574732

Title:
  Regression: Kernel Update in 16.04 from last days renders nvidia
  driver unusable

Status in shim:
  New
Status in linux package in Ubuntu:
  Confirmed
Status in xorg package in Ubuntu:
  Confirmed

Bug description:
  I am running Ubuntu 16.04 since at least four months, always with the
  nvidia proprietary drivers (installed from the repository). I used
  nvidia-361 for a while with no issues (and i need it for steam
  gaming). However, an update installed on my machine yesterday breaks
  the nvidia drivers. I tried purging the driver, rebooting and
  reinstalling and i tried a newer version for the ubuntu-drivers ppa.
  Nothing helps: With the nvidia driver installed, i get a low-
  resolution login screen, but cannot login due to missing 3d
  acceleration. Running on nouveau works fine.

  This seems very strange to since everything worked until this
  afternoon. Yesterday, i was happily playing games on steam, installed
  some updates and now, my graphics are broken.


  
  $ lspci | grep NVIDIA
  01:00.0 VGA compatible controller: NVIDIA Corporation GM107 [GeForce GTX 750] (rev a2)
  01:00.1 Audio device: NVIDIA Corporation Device 0fbc (rev a1)

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: xorg 1:7.7+13ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  .tmp.unity_support_test.0:
   
  ApportVersion: 2.20.1-0ubuntu2
  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
  Date: Mon Apr 25 17:45:12 2016
  DistUpgraded: 2016-03-11 21:34:38,175 DEBUG enabling apt cron job
  DistroCodename: xenial
  DistroVariant: ubuntu
  DkmsStatus:
   bbswitch, 0.8, 4.4.0-21-generic, x86_64: installed
   virtualbox, 5.0.18, 4.4.0-18-generic, x86_64: installed
   virtualbox, 5.0.18, 4.4.0-21-generic, x86_64: installed
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   NVIDIA Corporation GM107 [GeForce GTX 750] [10de:1381] (rev a2) (prog-if 00 [VGA controller])
     Subsystem: Palit Microsystems Inc. GM107 [GeForce GTX 750] [1569:1381]
  InstallationDate: Installed on 2016-01-05 (110 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic.efi.signed root=UUID=ed669b2d-c3af-4570-9eb7-2978557208ae ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg crash
  UpgradeStatus: Upgraded to xenial on 2016-03-11 (44 days ago)
  dmi.bios.date: 05/18/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P2.30
  dmi.board.name: H97 Performance
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.30:bd05/18/2015:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnH97Performance:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.
  version.compiz: compiz 1:0.9.12.2+16.04.20160415-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.67-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2
  version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
  xserver.bootTime: Mon Apr 25 17:44:29 2016
  xserver.configfile: default
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.18.3-1ubuntu2
  xserver.video_driver: modeset

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