I am running a 12.04 64bit config on a T430. Bumblebee/optirun are functioning well: Glxgears normally: 61.037fps Glxgears optirun: 1135.062
If a co-worker drops her windows laptop into my docking station the DVI ports work fine so it's not the dock. I'm pretty sure my laptop is fine as well but can't verify it that I know of.
If I run "sudo optirun -b auto nvidia-settings" it says it doesn't see me running a NVIDIA X driver. There is also nothing in the Ubuntu Display control panel for the monitors.