3 monitors (vga, dvi, hdmi) recognized, but no image on HDMI

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So far, I have used VGA and DVI monitors on NVidia GeForce 650 card and all worked flawlessly. Today I purchased BenQ 2460 HDMI monitor, connected it, NVidia Xserver Conf tool recognized it

but the screen remained black on HDMI monitor (BenQ 2460). When I turn it on it keeps saying “No Cable Detected”.

I used the latest NVidia drivers

I have no idea how to solve this. Pressing “Detect monitors” does not help at all.

What shall I do? I thought that vga/dvi/hdmi is supported combination on Ubuntu 14.04.

I also read all top posts on similar issues and they did not help. Should I install some other drivers maybe?

XANDR output:

xrandr
Screen 0: minimum 8 x 8, current 5520 x 1080, maximum 16384 x 16384
VGA-0 connected primary 1680x1050+0+0 (normal left inverted right x axis y axis) 459mm x 296mm
   1680x1050      59.9*+   60.0  
   1280x1024      75.0     60.0  
   1280x960       60.0  
   1152x864       75.0  
   1024x768       75.0     70.1     60.0  
   800x600        75.0     72.2     60.3     56.2  
   640x480        75.0     72.8     59.9  
DVI-D-0 connected 1920x1080+1680+0 (normal left inverted right x axis y axis) 477mm x 268mm
   1920x1080      60.0*+
   1680x1050      60.0  
   1600x900       60.0  
   1280x1024      60.0  
   1280x960       60.0  
   1280x800       59.8  
   1280x720       60.0  
   1024x768       60.0  
   1024x576       60.0  
   800x600        60.3  
   640x480        59.9  
HDMI-0 connected 1920x1080+3600+0 (normal left inverted right x axis y axis) 531mm x 299mm
   1920x1080      60.0*+   59.9     50.0     60.1     60.0     50.0  
   1680x1050      60.0  
   1600x900       60.0  
   1280x1024      75.0     60.0  
   1280x800       59.8  
   1280x720       60.0     59.9     50.0  
   1024x768       75.0     60.0  
   800x600        75.0     60.3  
   720x576        50.0     50.1  
   720x480        59.9     60.1  
   640x480        75.0     59.9     59.9  
VGA-1 disconnected (normal left inverted right x axis y axis)

Answer

It looks like you’re trying to use three monitors on one card which, as far as I know, isn’t possible. Like you’re experiencing, the third monitor will be recognized, but trying to enable it either won’t work, or it will disable the non-main (secondary) monitor. It’s not a driver problem or a problem with Ubuntu, it’s just not possible.

Attribution
Source : Link , Question Author : ubuntico , Answer Author : TheWanderer

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