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[Salvatore Martire <klarkent911@xxxxxxxxx>]

Installed nvidia-331-updates but still the problem persists.
If I "sudo modprobe nvidia" I get the error "modprobe: ERROR: could not insert 'nvidia_331_updates': Invalid argument" and if I try "prime-switch nvidia" I get "/etc/modprobe.d is not a file"
In attachment also my Xorg.0.log when booting after "prime-select nvidia"

** Attachment added: "Xorg.0.log"
   https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1362848/+attachment/4239930/+files/Xorg.0.log

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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

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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