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I'm using a notebook with a second display connected with a VGA cable and I have Ubuntu 18.04.

I've never faced any issue before but after I started to play Age of Empires 2 HD (using Steam + protontricks) with full screen on my built-in display, the problems showed up. When I rebooted my computer, the second display didn't show anything.

So I went to Display settings, selected "Join Displays" options. The second monitor turned on for just a few seconds and then turned off right away. After some tweaks on Display settings, somehow the second monitor finally remained turned on, but it was a random behaviour.

I ran xrandr --listmonitors and this was the output:

Monitors: 2
 0: +*LVDS-1 1280/344x720/193+0+0  LVDS-1
 1: +VGA-1 1280/373x720/209+0+0  VGA-1 

And after running sudo lshw -C display:

  *-display                 
       description: VGA compatible controller
       product: 3rd Gen Core processor Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:29 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:3000(size=64) memory:c0000-dffff

I suspect that it has something to do with my integrated graphics card, I believe it has messed up after I started to play that game on full resolution.

Do you know why my second monitor is not displaying anything?

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  • It could be as simple as the VGA cable is going bad. The monitor and the computer cannot communicate well enough. May 9, 2020 at 23:21
  • It could be but is kinda strange that it began to happen after playing a video game with full resolution. I'm gonna try with another VGA cable though
    – Manowar
    May 10, 2020 at 19:23
  • This still doesn't work, any more ideas?
    – Manowar
    May 18, 2020 at 21:17
  • Please tell us all what graphics card you have. sudo lshw and let us know what Graphics card you have. You can try the PPA for Nvidia if that is what you have. launchpad.net/~graphics-drivers/+archive/ubuntu/… You can try rolling back to an older driver? You can try the Nouveau drivers. May 20, 2020 at 4:35
  • Thanks for your answer! I've updated the post with the output of that command! I have an Intel integrated graphics card. I will try rolling back to an older driver as you say or using Nouveau drivers.
    – Manowar
    May 20, 2020 at 22:08

1 Answer 1

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I would first make sure you know what driver is installed. You can do this from the GUI or from the command line.

nvidia-settings --version

Then you can change what version you are using by seeing what is available

sudo ubuntu-drivers devices

And then installing the one you want.

sudo apt-get install nvidia-theNumberYouWant

Sometimes a purge is recommended before you start.

sudo apt-get autoremove --purge nvidia-*
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  • Hi, I don't have an external graphics cards, I have an internal graphics cards. I tried by reinstallig xserver-xorg-video-intel but it didn't make any effect. Should I boot with an old Kernel?
    – Manowar
    Jun 3, 2020 at 13:07
  • I just found out my external monitor is not completely black, its brightness is too low but I wasn't able to improve it
    – Manowar
    Jun 5, 2020 at 20:48

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