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Windows 7: Dual display problem

14 Mar 2013   #1
Tahvo

Windows 7 Home Edition
 
 
Dual display problem

I've connected to my Ati Radeon HD 9650 graphics card two displays and this is the problem:

Display 1 (VGA) is connected to a Dual-link DVI-I port (port 5) with an VGA adapter. Everything works perfectly well.

Display 2 (TFT) is connected to a Single-link DVI-D port (port 1) directly with a DVI cable. This connection causes the problem:

  • When turning the power on both displays show the motherboard's logo and then the 'Starting Windows' animation. After that display 2 goes blank.
  • When opening BIOS (before Windows starts) both displays are showing the BIOS and not going blank (until when switched back to Windows).
How is this possible? First both displays are functioning normally and then not.

My Windows 7 and graphic card's Control Center both do not detect the second monitor --> there is no option in Display Menu for "Enable Extended Desktop" or something similar which would be the normal procedure (worked with my old Radeon 9800 & Win XP combination). The second display can not be detected/enabled automatically nor by manually forcing.


NB: and before you ask: no, there is no display port in motherboard. All display ports (2xDVI, 2xminiDisplay, 1xHDMI) are on graphics card.


My System SpecsSystem Spec
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14 Mar 2013   #2
Indianatone

Windows 7 x64 Ultimate and numerous virtual machines
 
 

Hi Tahvo and welcome to Seven forums.
I have had a similar issue and I reversed the monitors. So take the output to the CRT VGA and swap it for the LCD and vice versa. One of the DVI connectors has sensing for what is connected and the other does not. Also verify you have the latest drivers and power off the machine when you swap over the connections so the computer is aware what happened. You should then see the options in Catalyst Control Center and in Windows Desktop Settings.
My System SpecsSystem Spec
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 Dual display problem




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