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I am struggling using a second monitor with my laptop. I tried the different solutions I found in other topics with no clue.

The output of xrandr is:

    xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080
default connected primary 1920x1080+0+0 0mm x 0mm
   1920x1080     77.00* 
  1920x1200_60.00 (0x2b5) 193.250MHz -HSync +VSync
        h: width  1920 start 2056 end 2256 total 2592 skew    0 clock  74.56KHz
        v: height 1200 start 1203 end 1209 total 1245           clock  59.88Hz

but this seems to be related to the laptop monitor and not the external one.

In Settings I can only see Screen Display and not other displays appear or any identify button.

It's a philips monitor, if that could help.

EDIT

This is what I see in Software and Updates: Screenshot

Spir4L
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