06-24-2015 03:58 AM
Hi, sorry if this has already been answered elsewhere.
I have a work provided thinkpad x240 with a thinkpad prodock 40a1 and dual external monitors
I need to hook up the dual monitors to use as an extended screen. The IT department say it can't be done!
I have windows 7 and it looks like the pc and dock are compatible with dual monitors. http://support.lenovo.com/us/en/documents/pd029622
One monitor is hooked up by VGA and the other by DVI. The pc will only see a single monitor so i only get a mirrored image and cant extend the desktop.
Can anyone help establish whether an extended screen with dual external monitors is possible and if so what is the best way to hook it up?
do i need a dual dvi splitter cable for example?
Any help is much appreciated in my quest to beat the IT bods who are trying to fob me off. I've had my monitors on the desk for 6 months now and its driving me mad. this must be doable!
06-24-2015 04:54 AM - edited 06-24-2015 04:57 AM
Use the displayport to drive multiple monitors. A mini displayport to displayport adapter plus the splitter i linked = awesomeness. This should work just fine.
Please note i didn't test this, and the splitter makes 2 monitors work like one.
06-24-2015 05:26 AM - edited 06-24-2015 05:31 AM
I think this can be done.
Try these configurations:
1.One monitor on Dock's VGA + one on laptop's VGA.
2.Both monitors on laptop's display port and VGA. Use a displayport to HDMI or DVI / VGA, whatever your case is.
3.One monitor on Dock's VGA + one on laptops's displayport.
I am not sure if 1 will work, as i had issues doing that on a x230. The VGA on the laptop and the VGA on the dock seem to be the same, as the connection is linked or something. But don't take my word, i am not an expert.
Hope this helps.
06-24-2015 05:33 AM
I think you are right. My understanding is that the laptop VGA out cant be used when on the dock.
will have a play with the combinations you suggest.
I'm determined to get this working!
06-24-2015 05:46 AM
Do it well, worse becomes itself
06-24-2015 06:34 AM
thanks for your reply.
I have read and re-read the the page i linked above, which is why i dont understand how best to link up the monitors. I thought it would heklpful to post the link in case i'm missing something. The lenovo set-up poster also shows DVI or DP and VGA for dual monitors but there's no mention as to whether this is allows extension of the desktop or simply mirroring.
I'm certainly no IT expert but I'm refusing to accept that in this day and age I can't have an extended desktop across 2 monitors.
Currently, with separate DVI and VGA cables in the dock, windows 7 is only identifying one external monitor and the laptop screen. it will mirror across all 3 but not extend.