T520 problems with external monitor resolution

Hi,
I am on permanent hold right now waiting for a Lenovo tech support rep, so I thought I would just post my issue here. I just purchased a Dell ultrasharp U2713HM monitor and am trying to connect it to my Lenovo T520. Sometimes it sees the monitor and sometimes it doesn't, but that isn't my main issue. The monitor is supposed to be 2560x1440, but all of the resolution settings are greyed out. I know the Lenovo can support it because my last monitor was a Samsung SyncMaster that supported 2560x1440, and it was beautiful (beautiful until the monitor blew up).
I have been on the phone with both Dell and Lenovo, and so far nobody has been able to resolve the issue. I upgraded the NVIDIA graphics card driver (NVS4200M) to the most recent version (310.90) as suggested by Dell, and I switched out the VGA cable for the DVI-D cable (connected to a Dual Link Adapter), as suggested by Lenovo. It stlil isn't working.
I could use any suggestions. I am not techy at all, so this is pretty frustrating. Thank you!!
Solved!
Go to Solution.

marikof wrote:
Okay, another update. I changed the graphics thingy in the bios from NVIDIA optimus to discrete based on someone's suggestion, but that did not work, either with the displayport cable OR the dual link adapter. I also just spoke with the Dell tech, and he basically told me to take it to a shop to see if they could figure it out. In other words, I am out of ideas, and I think I will just return the monitor unless anyone out there has any other suggestoins! Thank you!
Just to be clear, are you saying you have a cable with DisplayPort on both ends and your tried that with the default BIOS setting (Optimus), then Discrete, then Integrated and it didn't work on either of those three settings?

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T520 problems with external monitor resolution

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