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[kcpr <1362848@xxxxxxxxxxxxxxxxxx>]

After some time and prayer I've somehow got it fixed. :) Just totally reinstalled drivers.
Before I tried a lot of different stuff - like installing bumblebee, gdm or different drivers for example. That's why not all of this steps will be required for You I believe. On the other hand maybe I did something more before, which You will not find here. Anyway You can try it.

sudo ppa-purge ppa:bumblebee/stable
sudo rm /etc/X11/xorg.conf*
sudo apt-get purge nvidia* bumblebee*
sudo rm /etc/X11/xorg.conf
sudo apt-get autoremove
sudo apt-get update
sudo apt-get upgrade
sudo reboot
sudo apt-get install nvidia-331 nvidia-prime
sudo reboot

And before I purged 'xorg-edgers' ppa with 'ppa-purge ppa:xorg-edgers '.

And my current '/etc/X11/xorg.conf' content:
"

Section "ServerLayout"
    Identifier "layout"
    Screen 0 "nvidia"
    Inactive "intel"
EndSection

Section "Device"
    Identifier "intel"
    Driver "intel"
    BusID "PCI:0@0:2:0"
    Option "AccelMethod" "SNA"
EndSection

Section "Screen"
    Identifier "intel"
    Device "intel"
EndSection

Section "Device"
    Identifier "nvidia"
    Driver "nvidia"
    BusID "PCI:1@0:0:0"
    Option "ConstrainCursor" "off"
EndSection

Section "Screen"
    Identifier "nvidia"
    Device "nvidia"
    Option "AllowEmptyInitialConfiguration" "on"
    Option "IgnoreDisplayDevices" "CRT"
EndSection

".

Hope that it will also work for You.

-- 
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

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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