Ubuntu 18.04 LTS and 20.04 LTS show a second unknown display, which is not actually present. I have tried every related solution with no success.
- I am running Ubuntu 18.04 LTS.
- I have a NVIDIA GeForce GTX 1650 graphic card.
- I have nvidia-driver-470 installed.
Attempts:
- Clean install Ubuntu 18.04 LTS
- Upgrade to Ubuntu 20.04 LTS
- Solutions involving
sudo ubuntu-drivers autoinstall
- purging nvidia drivers and reinstalling.
- modifying grub file
GRUB_CMDLINE_LINUX for unknown display at DP-1-3
xrandr output:
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP-1-1 connected primary 1920x1080+0+0 (normal left inverted right > x axis y axis) 344mm x 194mm
1920x1080 60.00*+ 59.97 59.96 59.93
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1440x900 59.89
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1360x768 59.80 59.96
1280x800 59.99 59.97 59.81 59.91
1152x864 60.00
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
800x512 60.17
700x525 59.98
800x450 59.95 59.82
640x512 60.02
720x450 59.89
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
680x384 59.80 59.96
640x400 59.88 59.98
576x432 60.06
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
DP-1-1 disconnected (normal left inverted right x axis y axis)
DP-1-2 disconnected (normal left inverted right x axis y axis)
DP-1-3 connected (normal left inverted right x axis y axis)
1024x768 60.00
800x600 60.32 56.25
848x480 60.00
640x480 59.94
DP-1-3 is the unknown monitor. I believe it is preventing me from using an external HDMI monitor.
