Support for NVIDIA Geforce GTX850m

Yes. Nvidia make fantastic video drivers

Please provide the output of the terminal commands

uname -a
lsb_release -crid
sudo lshw -C display
dpkg -l | grep -I nvidia

uname -a
Linux cirelli-pc 3.19.0-13-generic #13-Ubuntu SMP Thu Apr 9 22:56:40 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
cirelli@cirelli-pc:~$ lsb_release -crid
Distributor ID: Ubuntu
Description: Ubuntu Vivid Vervet (development branch)
Release: 15.04
Codename: vivid

sudo lshw -C display
  *-display
       description: VGA compatible controller
       product: 4th Gen Core Processor Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 06
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:34 memory:f7400000-f77fffff memory:d0000000-dfffffff ioport:f000(size=64)

dpkg -l | grep -l nvidia
(standard input)

I know the system see the video card because the output of the command lspci is:

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06)
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05)
00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d5)
00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d5)
00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d5)
00:1f.0 ISA bridge: Intel Corporation HM86 Express LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 05)
00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05)
01:00.0 3D controller: NVIDIA Corporation GM107M [GeForce GTX 850M] (rev ff)
03:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)
04:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5287 (rev 01)
04:00.1 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 12)

3D controller NVIDIA!

You are using one of these systems that have two graphic Cards. For using the Nvidia card you must use special programs like NVidia-prime or bumblebee.
I am not sure whether all these are already working well in the Ubuntu 15.04 development release that has not yet been published for general use, but is still in development status.

Yes, I'm using both, but I think it's still in development status, something doesn't work!

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