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[Juan Montero <jjmontero9@xxxxxxxxx>]

This solution worked for me, but I had to manually install nvidia-dkms-390.
I think bumblebee-nvidia should pull in this package automatically.

My steps were:
1. apt purge nvidia* bumblebee*
2. apt install bumblebee-nvidia nvidia-dkms-390
3. edit the config file exactly as provided by Rocko in post #1
4. create the blacklist file accordingly
5. disable nvidia-fallback

After reboot, optirun works.

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https://bugs.launchpad.net/bugs/1758243

Title:
  bumblebee needs configuration changes to work with nvidia-driver-390
  and libglvnd0

Status in bumblebee package in Ubuntu:
  Confirmed

Bug description:
  bumblebee fails to work in Ubuntu 18.04 with nvidia-driver-390 unless
  these configuration changes are made:

  1. For optirun to work, /etc/bumblebee/bumblebee.conf needs two
  library paths changed (because of the changes for GLVND):

  [driver-nvidia]
  LibraryPath=/usr/lib/x86_64-linux-gnu:/usr/lib/i386-linux-gnu
  XorgModulePath=/usr/lib/x86_64-linux-gnu/nvidia/xorg,/usr/lib/xorg/modules,/usr/lib/xorg/modules/input

  With these changes, optirun works correctly on my laptop (using the
  primus bridge) but primusrun still fails.

  2. For power management to work (ie turning the nvidia card off whilst
  not in use), the nouveau and nvidia modules need blacklisting so they
  don't load on boot, and nvidia_drm and nvidia_modeset need aliasing to
  off so they never load. Otherwise, nvidia_drm attaches to
  drm_kms_helper and then bumblebee can't unload the nvidia module and
  turn off the card. This configuration file in /etc/modprobe.d/nvidia-
  bl.conf works for me:

  blacklist nouveau
  blacklist nvidia
  blacklist nvidia_drm
  blacklist nvidia_modeset
  alias nouveau off
  alias nvidia_drm off
  alias nvidia_modeset off

  (The first two lines are already in bumblebee.conf. I found I also had
  to alias nouveau to off because gdm?/mutter? so desperately wants to
  load it.)

  
  Update: aliasing nouveau to off doesn't stop the nvidia-fallback service from loading the nouveau module, so if nouveau is still loading, you could try running this command:

  
  systemctl disable nvidia-fallback.service

  
  You'll need to reboot because nouveau is already loaded, but the change should be permanent unless something else re-enables the nvidia-fallback service.

  
  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: bumblebee 3.2.1-17
  Uname: Linux 4.16.0-041600rc6-generic x86_64
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Mar 23 12:18:02 2018
  InstallationDate: Installed on 2017-08-16 (218 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  SourcePackage: bumblebee
  UpgradeStatus: Upgraded to bionic on 2017-11-17 (125 days ago)
  modified.conffile..etc.bumblebee.xorg.conf.nouveau: [modified]
  modified.conffile..etc.bumblebee.xorg.conf.nvidia: [modified]
  mtime.conffile..etc.bumblebee.bumblebee.conf: 2018-03-23T12:17:54.683287
  mtime.conffile..etc.bumblebee.xorg.conf.nouveau: 2018-03-22T14:01:52.732698
  mtime.conffile..etc.bumblebee.xorg.conf.nvidia: 2018-03-22T14:57:34.141995

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