So, i have two monitors, one connected by HDMI to nvidia card, then another monitor connected with VGA to the motherboard.
But only the monitor that is connected to GPU works, the other i just turn on it and stays in black(but on).
It just happens with nvidia propietary drivers, with nouveau and arandr configs works fine.

xrandr --listproviders
Providers: number : 1
Provider 0: id: 0x279 cap: 0x1, Source Output crtcs: 4 outputs: 6 associated providers: 0 name:NVIDIA-0
xrandr --q
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384
DVI-I-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 509mm x 286mm
   1920x1080     60.00*+  59.94    50.00    29.97  
   1680x1050     59.95  
   1440x900      59.89  
   1280x1024     60.02  
   1280x800      59.81  
   1280x720      60.00    59.94    50.00  
   1152x864      75.00  
   1024x768      70.07    60.00  
   800x600       60.32    56.25  
   720x576       50.00  
   720x480       59.94  
   640x480       59.94    59.93  
DP-0 disconnected (normal left inverted right x axis y axis)
DVI-D-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)

If more logs are needed pls post it.