PS: workaround by Mihai to mirror displays works for me too, to get something on the external display. Same as for Mihai, the display is not listed anywhere.
Here is the xrandr output: xrandr Screen 0: minimum 320 x 200, current 1600 x 900, maximum 8192 x 8192 eDP-1 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 293mm x 164mm 1600x900 60.00*+ 59.99 59.94 59.95 59.82 1440x900 59.89 1400x900 59.96 59.88 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 VGA-1 disconnected (normal left inverted right x axis y axis) HDMI-1 disconnected 1600x900+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1600x900 60.00* DP-1 disconnected (normal left inverted right x axis y axis) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libxrandr in Ubuntu. https://bugs.launchpad.net/bugs/1771185 Title: Secondary monitor not connecting in 18.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libxrandr/+bug/1771185/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
