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05-02-2021

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T480s, 40as dock, trying to hook up 3 external monitors.

2021-05-02, 2:21 AM

Hello everyone. I'm new to this site and I am by no means computer savvy, so if you can, please keep it simple for me. 

 

I'm trying to help out my wife, who now works from home permanently due to Covid. She has a company supplied T480s and a 40AS dock. I bought her 3 identical HP monitors, and made a stand for them to clear some desk space. Anyhow, we've tried a few times to get all 3 monitors to extend. If we can get this working, the laptop will stayed "lid closed". What is happening, we can get all 3 external monitors to extend and display, but one of the three monitors changes resolution and the display on the screen is extremely large and unreadable. The cursor looks like a small aircraft on the screen. We don't need 4K, 1080P would work just fine, it's just emails and data, no gaming.  I tried buying a dock off Amazon that has 3 HDMI ports, no change. I bought 2 active DP1.4 to HDMI adapters, and tried hooking the 2 of the monitors to the display ports on the dock. That worked worse. Any suggestions short of me getting out a 20 pound sledge-o-matic? Thanks. Mark.

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4864 Posts

08-02-2018

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Re:T480s, 40as dock, trying to hook up 3 external monitors.

2021-05-03, 7:06 AM


Hi Helpingmywife!


Welcome to community forums

 


The t480s can support up to 3 external monitors(laptop's screen is off) via USB Type-C(4096 x 2304 @ 60Hz) and HDMI(4096 x 2160 @ 30Hz) and you can refer to the product spreadsheet here: https://psref.lenovo.com/syspool/Sys/PDF/ThinkPad/ThinkPad_T480s/ThinkPad_T480s_Spec.PDF

 

The docking station is listed as compatible with the laptop: https://accessorysmartfind.lenovo.com/#/search?categoryL1Name=Docking&categoryL2Names&keyword=&pageIndex=1&pageSize=40&query=&subSeriesList=22TP2TT480S&systemId=22TP2TT480S

 

Can you try the setup guide for 3 displays here: https://support.lenovo.com/ph/en/solutions/pd029622-display-and-video-output-configurations-docking-stations#Ultra%20Docking

 


If the issue is the same, try updating the driver and the firmware of the docking station here: https://support.lenovo.com/us/en/solutions/acc500106-thinkpad-usb-c-dock-gen-2-overview-and-service-parts

 

Let us know how it goes.

 

 


Jwes_Lenovo



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4864 Posts

08-02-2018

Philippines

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Re:T480s, 40as dock, trying to hook up 3 external monitors.

2021-05-03, 7:06 AM


Hi Helpingmywife!


Welcome to community forums

 


The t480s can support up to 3 external monitors(laptop's screen is off) via USB Type-C(4096 x 2304 @ 60Hz) and HDMI(4096 x 2160 @ 30Hz) and you can refer to the product spreadsheet here: https://psref.lenovo.com/syspool/Sys/PDF/ThinkPad/ThinkPad_T480s/ThinkPad_T480s_Spec.PDF

 

The docking station is listed as compatible with the laptop: https://accessorysmartfind.lenovo.com/#/search?categoryL1Name=Docking&categoryL2Names&keyword=&pageIndex=1&pageSize=40&query=&subSeriesList=22TP2TT480S&systemId=22TP2TT480S

 

Can you try the setup guide for 3 displays here: https://support.lenovo.com/ph/en/solutions/pd029622-display-and-video-output-configurations-docking-stations#Ultra%20Docking

 


If the issue is the same, try updating the driver and the firmware of the docking station here: https://support.lenovo.com/us/en/solutions/acc500106-thinkpad-usb-c-dock-gen-2-overview-and-service-parts

 

Let us know how it goes.

 

 


Jwes_Lenovo



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05-02-2021

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Re:T480s, 40as dock, trying to hook up 3 external monitors.

2021-05-13, 0:50 AM

Hello all and thanks for your help. We finally did get this working. We had to update the driver and firmware. This was done by the IT department at my wife's law firm. They are kind of picky about who does that stuff. Understandable. Anyhow, the connections that ended up working are as follows:

 

             1 HDMI cable from laptop HDMI port on the right side to first monitor.

 

             1 HDMI cable from HDMI port on 40AS hub to second monitor.

 

             1 HDMI cable from DP port on 40AS hub to third monitor using an active DP1.4 to HDMI adaptor.

 

This is also set up for the laptop lid to be closed and the laptop moved out of the way.

 

Ultimately, is was easier to physically rearrange the monitors than to try to convince the laptop which one was 1, 2 and 3.

 

Once again, thank you for your assistance. My wife now has three identical monitors all displaying the same resolution.

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4864 Posts

08-02-2018

Philippines

871 Signins

24985 Page Views

  • Posts: 4864
  • Registered: ‎08-02-2018
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  • Views: 24985
  • Message 4 of 4

Re:T480s, 40as dock, trying to hook up 3 external monitors.

2021-05-13, 12:23 PM

Good to hear that.

 

Cheers!

 

 

 


Jwes_Lenovo



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