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07-25-2018

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Thinkpad T480 with pro dock on 3 monitors

2018-08-23, 23:05 PM

Hi Guys,


I have a T480 laptop with a pro dock docking station and 3 monitors i want to try to get working.

2 of the monitors are working fine via a VGA > DP adapter. The 3rd i bought a USB-C to HDMI adapter, though i cannot get this to work, even with the other two monitors disconnected.

If the laptops undocked and the 3rd monitor is connected to the USB-C port, it works. Has anyone had luck with 3 monitors on this docking station?

 

I have been considering a display port hub, can we use adapters with these hubs ok or does it only work if the cable is solely DP

 

Thanks guys

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4 Posts

08-23-2018

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Re: Thinkpad T480 with pro dock on 3 monitors

2018-08-24, 14:18 PM

I'm trying to do almost the same thing my T580, however I can leave mine docked if I turn off the monitors connected to the dock, the (in my case HDMI port) to my 3rd monitor will turn on.  No answer so far on my thread yet.

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4846 Posts

04-25-2008

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Re: Thinkpad T480 with pro dock on 3 monitors

2018-08-24, 14:33 PM

Hi Crumbs83 and 8675309,

 

If you want to use 3 monitors, why do you have the Pro dock, which supports 2 monitors? The Ultra dock supports 3 monitors.

https://support.lenovo.com/us/en/solutions/pd029622#Pro%20Docking

I don't work for Lenovo. I'm a crazy volunteer!
Using Browser Search To Find Answers in the Lenovo and Moto Communities.
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4 Posts

08-23-2018

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Re: Thinkpad T480 with pro dock on 3 monitors

2018-08-24, 14:40 PM

Because that is what my employer purchased, I did not have a say in what dock I received.  It doesn't change that if the graphics card can drive 3 monitors, there's no reason that using a dock with two monitors should kill the HDMI port.

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Re: Thinkpad T480 with pro dock on 3 monitors

2018-08-24, 14:58 PM

Thanks for the reply, it was a company purchase as i work from home. I had an ultra dock on my previous one so to try to make use of it i have tried to get it to work. I would of thought the pro dock USB - C port was capable of outputting to a HDMI monitor using a USB - C to HDMI adapter (Lenovo one) but doesnt seem to be the case.

 

Undocked its fine so its not the adapter / laptop / cable. Firmware upgraded the docking station and drivers but doesnt seem to want to play ball.

 

I have put a request in for an ultra docking station instead :-)

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5 Posts

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Re: Thinkpad T480 with pro dock on 3 monitors

2018-08-24, 15:01 PM

Dont believe you can run HDMI and DP together, i certainly couldnt get it to work on mine (connecting a 3rd monitor to the laptop directly)

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08-23-2018

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Re: Thinkpad T480 with pro dock on 3 monitors

2018-08-24, 15:07 PM
Why not? I have at home on other devices.
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386 Posts

03-03-2017

JP

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Re: Thinkpad T480 with pro dock on 3 monitors

2018-09-21, 12:12 PM

Dear Crumbs83,

Sorry for late response.

I assume you connected USB-C to HDMI adaptor to the ProDock USB-C connector because system side 2 USB-C ports are used by Pro Dock.  I'm sorry display port signal connected to 2 DP ports on ProDock but not connected to the ProDock USB-C connector.

On the other hand, Intel HD Graphics device has 3 display port signals and ThinkPad LCD and 2 external monitors use those 3 dispaly ports signals so that there is no chance to attach 3rd external monitor to your T480 + Pro Dock environment.

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1 Posts

03-04-2019

GB

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Re: Thinkpad T480 with pro dock on 3 monitors

2019-03-04, 11:02 AM

Hi

you mention "there is no chance to attach 3rd external monitor to your T480 + Pro Dock environment"

 

How about T480 and Ultra docking station, can I use this docking station with T480 to support 3 monitors?

 

Many thanks

 

Behshide

 

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386 Posts

03-03-2017

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Re: Thinkpad T480 with pro dock on 3 monitors

2019-03-08, 12:01 PM

Dear customer,

I'm sorry for confusing you.

I mean Intel Graphics device supports up to 3 display port on one system.

If customer use ThinkPad LCD, there are 2 display ports remaining. It doesn't matter Pro Doc or Ultra Dock, you can attach 2 external monitors only.

If customer disables use of ThinkPad LCD, you can use 3 external monitors.

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