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I've recently added a second monitor to my setup, and it's not working. Ubuntu recognizes the second monitor correctly, but my second monitor only displays a black screen. When I restart, the monitor will show the motherboard logo and Ubuntu's red background, but a few seconds before getting into the Ubuntu loading screen, it will turn itself black.

I'm using Ubuntu 18.04.2 and Intel Integrated Graphics (i5-7400). My main screen is a Samsung 23" connected through a DVI and my secondary screen is a Samsung 22" connected through and HDMI.

Things I've tried:

  • Connecting and disconnecting all monitors in different order

  • Used a VGA instead of an HDMI (It worked with the VGA)

  • Used the HDMI cable with another pc but same monitor (worked)

  • Update my Kernel and restarted the pc to apply the changes (sudo apt install linux-generic-hwe-18.04 xserver-xorg-hwe-18.04)

  • Change the resolution and refresh rate of my monitor

  • Check monitor settings and sources
  • Sudo apt update && apt upgrade

More Info:

xrandr
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 8192 x 8192
HDMI-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 477mm x 268mm
   1920x1080     60.00*+  60.00    50.00    59.94  
   1680x1050     59.88  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1280x800      59.91  
   1152x864      75.00  
   1280x720      60.00    60.00    50.00    50.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00    50.00  
   720x480       60.00    60.00    59.94    59.94  
   640x480       75.00    72.81    66.67    60.00    59.94  
   720x400       70.08  
HDMI-2 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 287mm
   1920x1080     60.00*+  50.00    59.94  
   1600x1200     60.00  
   1680x1050     59.88  
   1280x1024     75.02    60.02  
   1440x900      74.98    59.90  
   1280x960      60.00  
   1280x800      59.91  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    72.81    66.67    60.00    59.94  
   720x400       70.08  
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)

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