ThinkPad Ultra Dock - 90W US 40A20090US Dual Video Vga port dropping

We have a new lenovo 440 with this docking station.   There are two monitors hooked to both the DVD and VGA output.  
Everything works most of the time but every now and then the VGA monitor goes black and wont come back until you undock and redock the laptop.   The DVD monitor continues to work  its just the monitor attached to the VGA output. 
Any thoughts as to what the issue could be?
Solved!
Go to Solution.

Hi all,
thanks for posting. I believe you issue could be related to the solution I have below. Could you try the solution below.
NB: Make sure your system is docked to the ThinkPad Pro Dock or Ultra Dock with at least one external monitor connected.
The firmware for the DisplayPort hub in the dock needs to be updated :
If the display on an external monitor connected to a ThinkPad Pro Dock or a ThinkPad Ultra dock is flickering or going blank, download the firmware (fwdphb01.exe) from the following URL:
http://support.lenovo.com/en_US/detail.page?DocID=HT081248
Downloading:
A window will pop up asking you to Run or Save the file. Select Save.
Choose the folder you would like to download the file to and select Save. A different window will appear and the download will begin and complete. Once the download has completed, there may or may not be a message stating that the download completed successfully.
Make sure to be logged on with an Administrator account.
Make sure your system is docked to the ThinkPad Pro Dock or Ultra Dock with at least one external monitor connected.
Installing file:
Close all applications.
Double click the downloaded file: fwdphb01.exe
It will display the current firmware version and the firmware version to be installed.
If the current firmware version on your dock is older than 2.17.000, then click the Update firmware button.
Follow the instructions on the screen to complete installation and restart the dock with following action:
Shutdown the system, unplug the AC adapter from the dock, and wait for 5 seconds. Then, re-attach the AC adapter and power on.
6. If your docking station already updated, then click the Cancel Update button to exit.
Hope this helps and please do post back.
Regards

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