Three monitor setup one monitor is not showing desktop

[zedmor]

Tried to setup three monitors, drivers and everything woks fine, desktop even appears there on login screen but when I login to my user account 3rd monitor stays black (I can see mouse pointer on it but can't move any windows or see background).

Here's my config:

~/.config/monitors.xml


<monitors version="1"> <configuration>
<clone>no</clone>
<output name="DVI-I-0">
<vendor>HWP</vendor>
<product>0x2690</product>
<serial>0x01010101</serial>
<width>2560</width>
<height>1600</height>
<rate>60</rate>
<x>0</x>
<y>1080</y>
<rotation>normal</rotation>
<reflect_x>no</reflect_x>
<reflect_y>no</reflect_y>
<primary>yes</primary>
</output>
<output name="HDMI-0">
</output>
<output name="DP-0">
</output>
<output name="DP-1">
</output>
<output name="DVI-D-0">
<vendor>DEL</vendor>
<product>0x4035</product>
<serial>0x3433374c</serial>
<width>2560</width>
<height>1600</height>
<rate>60</rate>
<x>2590</x>
<y>1080</y>
<rotation>normal</rotation>
<reflect_x>no</reflect_x>
<reflect_y>no</reflect_y>
<primary>no</primary>
</output>
<output name="VGA-1">
</output>
<output name="HDMI-1">
<vendor>ACR</vendor>
<product>0x02ca</product>
<serial>0x21109a35</serial>
<width>1920</width>
<height>1080</height>
<rate>60</rate>
<x>1543</x>
<y>0</y>
<rotation>normal</rotation>
<reflect_x>no</reflect_x>
<reflect_y>no</reflect_y>
<primary>no</primary>
</output>
<output name="DP-1">
</output>
<output name="HDMI-2">
</output>
<output name="HDMI-3">
</output>
</configuration>
</monitors>

/home/<user>/xorg.conf.new

Section "ServerLayout" Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection


Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/X11/misc"
FontPath "/usr/share/fonts/X11/cyrillic"
FontPath "/usr/share/fonts/X11/100dpi/:unscaled"
FontPath "/usr/share/fonts/X11/75dpi/:unscaled"
FontPath "/usr/share/fonts/X11/Type1"
FontPath "/usr/share/fonts/X11/100dpi"
FontPath "/usr/share/fonts/X11/75dpi"
FontPath "built-ins"
EndSection


Section "Module"
Load "glx"
EndSection


Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection


Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
EndSection


Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection


Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz",
### <percent>: "<f>%"
### [arg]: arg optional
#Option "SWcursor" # [<bool>]
#Option "HWcursor" # [<bool>]
#Option "NoAccel" # [<bool>]
#Option "ShadowFB" # [<bool>]
#Option "VideoKey" # <i>
#Option "WrappedFB" # [<bool>]
#Option "GLXVBlank" # [<bool>]
#Option "ZaphodHeads" # <str>
#Option "PageFlip" # [<bool>]
#Option "SwapLimit" # <i>
#Option "AsyncUTSDFS" # [<bool>]
#Option "AccelMethod" # <str>
#Option "DRI" # <i>
Identifier "Card0"
Driver "nouveau"
BusID "PCI:1:0:0"
EndSection


Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection





what I can do there? where whole desktop configurated? Is it even possitble to have setup like this: two monitors at bottom side by side and third up top in the middle of those

[QIII]

Hello!

It would be helpful for us to know:

1. What flavor and release of Ubuntu you are using.
2. The manufacturer and model of your GPU.
3. What driver you have installed.

Cheers!

[zedmor]

16.04 desktop, gpus are nvidia gtx 970 and intel onboard graphics with native drivers. I do not think problem with drivers - I can move mouse pointer to 3rd montor and if I select it as only display it shows desktopjust fine, but now with two others....
May be someone knows where in X server config you can say how big your desktop is and where put wallpaper/windows.