<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">I am trying to get output on an external display such as a TV with a<br>
VGA input or a overhead projector.<br>
If I am already in X, it will not detect the new display connected no<br>
matter what I try and do in the ubuntu gnome display config screens.<br>
If I instead power off the laptop, and boot up with the display<br>
plugged in, it does detect the display and then the ubuntu gnome<br>
display config screens work as expected.<br></blockquote><div><br></div><div>Use the 'xrandr' command to enable and also orient the additional display.</div><div><br></div><div>Example from my laptop:</div><div><br>
</div><div><div>$ xrandr</div><div>Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 4096 x 4096</div><div>VGA disconnected (normal left inverted right x axis y axis)</div><div>LVDS connected 1680x1050+0+0 (normal left inverted right x axis y axis) 0mm x 0mm</div>
<div> 1680x1050 60.0*+</div><div> 1400x1050 74.8 60.0 </div><div> 1280x1024 85.0 75.0 60.0 </div><div> 1280x960 85.0 60.0 </div><div> 1152x864 75.0 </div><div> 1024x768 85.0 75.0 70.1 60.0 </div>
<div> 832x624 74.6 </div><div> 800x600 85.1 72.2 75.0 60.3 56.2 </div><div> 640x480 85.0 72.8 75.0 59.9 </div><div> 720x400 85.0 </div><div> 640x400 85.1 </div>
<div> 640x350 85.1 </div></div><div><br></div><div>This shows two displays, external VGA (disconnected) and LVDS (laptop screen).</div><div><br></div><div>If I plugged in VGA, then I could enable it with:<br><br>
</div><div>xrandr --output VGA --right-of LVDS</div><div><br></div><div>Hope that helps.</div><div><br></div><div>- Walter</div></div>