No widescreen display on HDMI output

Greetings

I’m using Ubuntu MATE 16.04 and I’m having a problem with my HDMI connection. I have a projector as a second monitor but it’s only supponrting 4:3 resolution.

I ran xrandr and I got the folowing output:

Screen 0: minimum 320 x 200, current 2390 x 768, maximum 8192 x 8192
eDP-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
   1366x768      60.00*+
   1360x768      59.80    59.96  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   960x600       60.00  
   960x540       59.99  
   800x600       60.00    60.32    56.25  
   840x525       60.01    59.88  
   800x512       60.17  
   700x525       59.98  
   640x512       60.02  
   720x450       59.89  
   640x480       60.00    59.94  
   680x384       59.80    59.96  
   576x432       60.06  
   512x384       60.00  
   400x300       60.32    56.34  
   320x240       60.05  
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 connected 1024x768+1366+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768      60.00*+ 119.99    75.03    70.07  
   1920x1080     60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98  
   1920x1080i    60.00    50.00    59.94  
   1600x1200     60.00  
   1400x1050     59.95  
   1280x1024     75.02    60.02  
   1280x960      60.00  
   1280x800      59.91  
   1152x864      75.00  
   1280x720      60.00    50.27    50.00    59.94  
   832x624       74.55  
   800x600      119.97    72.19    75.00    60.32  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480      119.99    75.00    72.81    66.67    60.00    59.94  
   720x400       70.08  

I hope somebody could give me some advice

Thanks.