How to change kernel vga?

Question

ubuntu

Ubuntu 14.04, gnome-desktop
Installed on the dock apt-get install nvidia-current
Everything was running ok before on the built-in video. And I needed everything to run from under the second Nvidia. Restarted after installation and on the built-in writes that the desktop can only be launched in Safe mode. And if you connect the cable to the second vidyahu, then a black screen.

lspci -vnn | grep -i VGA -A 12
00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0042] (rev 12) (prog-if 00 [VGA controller])
  Subsystem: Gigabyte Technology Co., Ltd Device [1458:d000]
  Flags: bus master, fast devsel, latency 0, IRQ 59
  Memory at fb800000 (64-bit, non-prefetchable) [size=4M]
  Memory at d0000000 (64-bit, prefetchable) [size=256M]
  I/O ports at ff00 [size=8]
  Expansion ROM at <unassigned> [disabled]
  Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
  Capabilities: [d0] Power Management version 2
  Capabilities: [a4] PCI Advanced Features
  Kernel driver in use: i915

00:16.0 Communication controller [0780]: Intel Corporation 5 Series/3400 Series Chipset HECI Controller [8086:3b64] (rev 06)
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GT200 [GeForce GTX 260] [10de:05e2] (rev a1) (prog-if 00 [VGA controller])
  Subsystem: ZOTAC International (MCO) Ltd. Device [19da:2120]
  Flags: bus master, fast devsel, latency 0, IRQ 16
  Memory at f8000000 (32-bit, non-prefetchable) [size=16M]
  Memory at e0000000 (64-bit, prefetchable) [size=256M]
  Memory at f6000000 (64-bit, non-prefetchable) [size=32M]
  I/O ports at df00 [size=128]
  [virtual] Expansion ROM at f9000000 [disabled] [size=512K]
  Capabilities: [60] Power Management version 3
  Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
  Capabilities: [78] Express Endpoint, MSI 00
  Capabilities: [100] Virtual Channel
  Capabilities: [128] Power Budgeting <?>

How to fix everything, how to start everything and preferably through the terminal. Do not go to the worker, even safe does not start.
I saw this if anything, how to change to Nvidia>> Kernel driver in use: i915
ADD
I also tried to add it roughly, it didn’t work out:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash noveau.modeset=1"
It also reboots on the same VGA, and the desktop in general does not start.
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash noveau.modeset=1"

ubuntu-drivers devices
== /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0 ==
vendor   : NVIDIA Corporation
model    : GT200 [GeForce GTX 260]
modalias : pci:v000010DEd000005E2sv000019DAsd00002120bc03sc00i00
driver   : nvidia-340 - distro non-free recommended
driver   : nvidia-304 - distro non-free
driver   : xserver-xorg-video-nouveau - distro free builtin