Second monitor not discovered

Second monitor (Samsung TV) won’t show as connected. I’ve tried three different hdmi cables and four different hdmi ports on the monitor. I’ve verified the cable (and ports) work by connecting an android box to it, which worked. One of the ports is specifically labeled PC (whatever that means) but that one does not work either. Ran nvidia-installer-dkms to make sure I had the drivers, but this did not solve it either. Using Gnome.

xrandr output

Screen 0: minimum 8 x 8, current 2560 x 1440, maximum 32767 x 32767
DVI-D-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 697mm x 392mm
   2560x1440     59.95 + 144.00*  120.00    74.97  
   1920x1080     74.91    60.00    59.94    50.00  
   1680x1050     59.95  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1280x800      59.81  
   1280x720      60.00    59.94    50.00  
   1152x864      59.96  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       59.94  
   640x480       75.00    59.94    59.93  
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
DP-5 disconnected (normal left inverted right x axis y axis)

It would be helpful to post some hardware and driver infos.

Top bar of forum under help you can find

If you have a hybrid card intel/nvidia card it maybe solved by installing optimus manager.

Are you connecting to the tv from a laptop or desktop computer?

Edit: https://wiki.archlinux.org/index.php/multihead

could be simply that you need to enable the display in settings (gnome or nvidia settings) to make them connected and showing up…

The eos-log-tool is there also for convenience

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