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My laptop can't detect the HDMI port and my Samsung TV shows no signal. When I run xrandr, my HDMI port doesn't show in the output.

Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
   1366x768       59.6*+
   1360x768       59.8     60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
TV1 disconnected (normal left inverted right x axis y axis)
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What graphics card do you have? –  Gilles Dec 29 '12 at 22:50
    
@Gilles I have "Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller" –  Youssef Yassin Dec 29 '12 at 22:59
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1 Answer

On television, go to Menu -> Input -> Edit name -> HDMI and set it to PC or DVI PC.

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How will changing the name make a difference? –  mattdm Apr 1 '13 at 17:26
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