1

I have a Laptop running the Ubuntu 18.04. At the beginning, I was using only the Laptop screen. And then, I tried to connect an external monitor via HDMI. At first, system couldn't detect the external monitor. I made some research and updated my GPU drivers. Recently, the second monitor is working fine, but the laptop screen is blank. And, I cannot see the laptop screen at the displays page. Unfortunately, I can no more use the Laptop screen by itself. I must always connect to an external monitor via HDMI. What do you think the problem is?

As if needed, system has an i7-8750H and a GTX1060 in it.

Here is a screenshot from the additional drivers page: Additional Drivers

Here is a screenshot from displays page: Displays

EDIT: I switched the GPU driver to nouveau driver. Now I can use the Laptop screen and system can detect the external monitor but not properly. Here is screenshot from Displays page:Displays after nouveau driver

  • If I mirror the screens, I can only see the cursor on the external screen. The Laptop screen works properly.
  • If I try to use only the Laptop screen, no problem occurs.
  • If I try to use only the external screen, I can see all windows but cannot click on them. The interesting thing is that I can move the mouse. How the hack, lol
  • If I try to join the screens, I can only see a black screen on the external monitor and Laptop screen works properly.

EDIT 2: I discovered something new.

  • If I de-activate external GPU by calling sudo prime-select intel, the external screen goes black and I only have the Laptop screen. After then, I can only see the "Built in Display" settings in the Displays page.

  • Same happens after activating the external GPU. I call sudo prime-select nvidia and then Laptop screen freezes with a blank screen on it. It also has the cursor at the bottom right corner. But, I cannot switch to it.

Caglayan DOKME
  • 111
  • 6

1 Answers1

0

I found a similar problem in the site. The guy solved the problem by removing configuration file under xorg. Here is the solution:

cd /etc/X11
sudo rm xorg.conf
sudo cp xorg.conf.nvidia-xconfig-original xorg.conf
reboot
Caglayan DOKME
  • 111
  • 6