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[Tomasz <glowacki.thomas@xxxxxxxxx>]

Looking at the same webpage (http://vxlabs.com/2015/02/05/solving-the-
ubuntu-14-04-nvidia-346-nvidia-prime-black-screen-issue/) in the
comments ( by By JustAnotherCCppXXDummy) there is another and much
simpler solution.

After you start your laptop (for optimus users - in nvidia mode), and
getting the black screen of death ;), close your lid to put your laptop
to sleep. Then open it and .... voila! You can now see the login screen.

This worked for me like a charm with the xorg-edgers 346 drivers.

OS: Ubuntu 14.04.2 64bit
Laptop: Asus UX32V
Desktop: Unity
Kernel: 3.13.0-46-generic
CPU: Intel® Core™ i7-3517U CPU @ 1.90GHz × 4 
GPU: GeForce GT 620M/PCIe/SSE2

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to nvidia-graphics-drivers-331 in Ubuntu.
https://bugs.launchpad.net/bugs/1362848

Title:
  ubuntu 14.04 after install nvidia binary driver  331.89  black screen
  and freeze

Status in nvidia-graphics-drivers-331 package in Ubuntu:
  Confirmed
Status in nvidia-graphics-drivers-340 package in Ubuntu:
  Confirmed
Status in nvidia-graphics-drivers-346 package in Ubuntu:
  Confirmed

Bug description:
  I'm using Ubuntu 14.04 64bit, after install nvidia binary driver
  331.89 from Additional Drivers application then reboot, it shows black
  screen, no login window, I even can't use ctrl+alt+F2 to switch to
  text mode, then I reboot and go to recovery mode, use 'prime-select
  intel' to switch to intel GPU and reboot, everything is fine, but as
  soon as I switch to nvidia GPU, still same issue.

  OS: Ubuntu 14.04 64bit
  Laptop: HP ENVY 15t Nvidia GeForce GT 740M + Intel HD 4600
  Desktop: Unity
  Kernel: 3.13.0
  CPU: Intel® Core™ i7-4700MQ

  Thanks!

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