PopOS detects two monitors when I only have one and I can't see the applications open because they open in the non-existent monitor.

[All3xJ]

Distribution (run cat /etc/os-release):

NAME="Pop!_OS"
VERSION="20.04 LTS"
ID=pop
ID_LIKE="ubuntu debian"
PRETTY_NAME="Pop!_OS 20.04 LTS"
VERSION_ID="20.04"
HOME_URL="https://pop.system76.com"
SUPPORT_URL="https://support.system76.com"
BUG_REPORT_URL="https://github.com/pop-os/pop/issues"
PRIVACY_POLICY_URL="https://system76.com/privacy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal
LOGO=distributor-logo-pop-os

Related Application and/or Package Version (run apt policy $PACKAGE NAME):
GRUB

Issue/Bug Description:
PopOS detects two monitors when I only have one and I can't see the applications open because they open in the non-existent monitor.

Steps to reproduce (if you know):
I have the issue either in Live PopOS USB and in installed PopOS.

Expected behavior:
There should be only one monitor.

Other Notes:
I have this issue only in my Acer Aspire 5750G.

I found the solution here: https://askubuntu.com/a/365017

So basically you open the terminal and you run:

xrandr | grep VGA

and you note that output.

Now you run

sudo gedit /etc/default/grub

and at the line GRUB_CMDLINE_LINUX="" you have write:

GRUB_CMDLINE_LINUX="video=VGA-1:d"

But:

• If your output was VGA-1-1, set video=VGA-1:d (setting video=VGA-1-1:d won't work).
• If your output was VGA-1-2, set video=VGA-2:d (setting video=VGA-1-2:d or video=VGA-1:d does not seem to work, although one may still try them out separately to be certain).

Then just run:
sudo update-grub

Even though I fixed it, I just wanted to report it so you can fix it to help new Linux people.

[jacobgkau]

Duplicate of pop-os/pop#1246.