I recently installed Ubuntu 24.04 LTS and it detects two monitors, one of which is a ghost, non-existing one. I have an old PC Lenovo ThinkCentre M92P, with 20 GB of RAM and a NVidia GT710 video Card. I didn't have this problem before when using Ubuntu 22.04.
Even though there is at least one question here on how to get rid of this second ghost monitor, those questions date back to several years ago. My knowledge in Linux is limited and I would like, if possible, a step by step guidance to solve this annoying problem.
Following other posts, I was able to run the xrandr -q command. Below is its output:
Screen 0: minimum 8 x 8, current 3840 x 1080, maximum 16384 x 16384
VGA-0 disconnected (normal left inverted right x axis y axis)
DVI-D-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 298mm panning 3840x1080+0+0
1920x1080 60.00*+ 144.00 119.98 99.93
1440x900 119.85
1280x1024 119.96 75.02 60.02
1024x768 119.99 75.03 60.00
800x600 119.97 75.00 60.32
640x480 120.01 75.00 59.94
HDMI-0 disconnected (normal left inverted right x axis y axis)
None-1-1 connected (normal left inverted right x axis y axis)
1920x1080 60.00 +
I believe that DVI-D-0 is where my real BENQ monitor is connected to and None-1-1 is the ghost one.
I would really appreciate your help to solve this issue.
