T400 and Advanced Mini Dock - does not detect DVI monitor

I have a T400 with integrated graphics and Windows 7 Professional 64-bit, and I recently bought an Advanced Mini Dock for it.  I have a Dell 1800FP monitor connected to the dock via the DVI output.  When I anchor the T400, the system does not detect the external monitor.  If I go to the resolution of the screen and click on detect, it does not appear.  The weird part is that if I reboot then than in the dock, when the system comes back he * is * detect and use the external monitor.

Any ideas what's happening?  Other equipment connected by the base (USB, Ethernet cable devices) all work very well.

I think I solved this problem.  I uninstalled my video driver and installed the latest version from the Lenovo Web site (which was more recent than the one found by Lenovo System Update).  Now my system properly detects the external monitor when I attach to the docking station.

Tags: ThinkPad Notebooks

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