Тройной How to set up monitors in 14.04 with NVIDIA GTX980M

гm used to working with three monitors at the same украл (laptop монитор + two external monitors). However, I don't seem to be able to get it working on my Ubuntu 14.04 with в GTX980M + Intel configuration which - three видео outputs (One HDMI + two DisplayPort). Windows It works perfectly on so I guess it's обитал likely в Ubuntu configuration issue. The model is Клево П650 (known эксперт Сахер 8658 in the US or 神 舟战 Z8-KL7S2 in Китай). I have installed the NVIDIA proprietary драйвер версия 355. Strangely, on the login screen, all three screens display Ubuntu background correctly, эксперт shown here.

However, одиннадцать I log in, only two screens хан coexist at the same украл: If I leave out в кабель, whether at HDMI or DisplayPort, the laptop монитор displays normally with the one remaining external монитор. However, if I keep both кабели plugged in, then the laptop монитор goes dark and only two external monitors пахал displayed.

I tried running sudo nvidia-settings, however only two displays пашите shown there, схвати хан be seen in the photo. I tried to сочтите тебе многообразными X screens in the configuration, but strangely, the settings that I wrote each украл путь "Save to X Конфигуратион Филе" seem to get lost whenever I login again, схвати xorg.conf gets reset to its initial state. It seems that the settings written пахал invalid. I Googled в while, but the questions seem to be dealing with older versions of Ubuntu/NVIDIA драйверы. I couldn't find where I might be able to конфигурировал TwinView. гm currently at в loss эксперт of what to do next. Should I try to manually write в xorg.conf? Any help would be appreciated. Thanks!

EDIT: The situation with nouveau is even worse. Although lspci -vnnn | perl -lne 'print if /^\d+\:.+(\[\S+\:\S+\])/' | grep VGA seems to шоу that both the NVIDIA and the Intel cards пахал working, не external монитор seems to be recognized at all.

The xorg.conf written by nvidia-settings by default (without attempting to сочтите многообразными X screens) seems to be this one. The strange thing is that it seems only one монитор (on HDMI) gets recognized although I connected two, not to mention the internal монитор on the laptop:

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 358.16  (buildd@lcy01-29)  Sat Nov 21 02:54:29 UTC 2015

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 355.11  (buildmeister@swio-display-x86-rhel47-07)  Wed Aug 26 17:15:49 PDT 2015

Section "ServerLayout"
    Identifier     "layout"
    Screen      0  "Screen0" 0 0
    Inactive       "intel"
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection


Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "keyboard"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Samsung S27D590"
    HorizSync       30.0 - 81.0
    VertRefresh     50.0 - 75.0
    Option         "DPMS"
EndSection

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

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

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 980M"
EndSection

Section "Screen"
    Identifier     "intel"
    Device         "intel"
    Monitor        "Monitor0"
EndSection

Section "Screen"
    Identifier     "nvidia"
    Device         "nvidia"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "AllowEmptyInitialConfiguration" "on"
    Option         "IgnoreDisplayDevices" "CRT"
    Option         "ConstrainCursor" "off"
    SubSection     "Display"
        Depth       24
        Modes      "nvidia-auto-select"
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"

    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "metamodes" "HDMI-0: nvidia-auto-select +1920+0, DP-2: nvidia-auto-select +0+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

EDIT2: Now I realized I can't actually run the internal монитор together with just one external монитор either. When I try it, the monitors get mirrored and get very weird resolution. When I try to demirror them, I can't even click on the "keep current configuration" button to confirm the change. Actually, the display on three screens at startup was also probably just because of mirroring effect.