L2440X LCD DVI cable problem - Windows 7

I have been running the L2440X using a VGA connection (with KVA switch) as I transitioned from an XP system to a new Windows 7 system (which has a NVIDIA Quadro FX 380 display adapter). I have finally shut down XP and transitioned to using the digital DVI connection on the display and the display adapter). The cable shipped with the display was a bit too short so I ordered a longer DVI-D dual. However when I rebooted with the longer cable, Windows 7 could not recognize the display and went to recovery mode which failed. When I rebooted with the original cable (DVI-D single) it worked fine. I have been assured from several sources that the DVI-D dual cable should work in this configuration and it must be a display problem. Is there any way to get the DVI-D dual cable to work with the L2440X display?
A secondary question - the image properties shown on the On-Screen Display lists 3 options - D-Sub (analog), DVI (digital) and DP. What is DP???

DP is display port.
From what i know you would need to use the correct cable for the DVI-D format, so for your monitor you would have to get the DVI-D single cable.
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

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