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T480 connection to Thunderbolt 3 Dock

2018-04-27, 15:01 PM

Hi.  Hoping that someone can provide a little guidance, and show me where I must be doing something wrong.

 

T480 (20L5 model) running Windows 10 1709 (Core i5, 8th Gen Intel)

Thunderbolt 3 Dock (40AC model)

Installed Thunderbolt Software is:  17.3.74.400

System BIOS is:  1.12

BIOS Thunderbol setting:  Security Level - No Security

 

When I connect the dock to the laptop via Thunderbolt 3 connector, the laptop DOES draw power.  So I know that it basically works.

What it does not do is anything else.  Connecting ethernet, usb keyboard and mouse, or even VGA monitor has no results.

 

Des anyone have any suggestions about what I might be doing wrong here?  Other settings to check?  Or am I possibly dealing with a faulty component?

 

Thanks in advance for any suggestions.

 

Chris

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03-08-2018

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Re: T480 connection to Thunderbolt 3 Dock

2018-05-15, 19:07 PM

Hi-


Did you ever find out why this is not working?


Thank you,

Dave

 

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Re: T480 connection to Thunderbolt 3 Dock

2018-05-16, 11:13 AM

Hi Dave,

 

Embarrsingly, yes.  I'm sorry to say it came down to using the wrong Thunderbolt port.  There is one port that is even with the ESC key on the back-left side.  Then there is a second port a little bit closer to the front of the laptop on the same side.  This second one is the actual port replicator.  The one I was using was purely for power.

 

If you need me, I'll be over here in the corner, wearing a dunce cap :)

 

Chris

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08-05-2018

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Re: T480 connection to Thunderbolt 3 Dock

2018-08-05, 7:58 AM
Hey Chris,

Just to clarify, since I get contradicting answers from different sources.
I bought a third-party dock which is supposed to connect via tb3 to my 480. It got power power-passthrough function but since another thread supposed that data and power won't pass through the same connector of the 480 I did not bother using it for power.

But with what you're saying it should theoretically be possible to connect a dock in the way power -> dock -> t480 via the tb3 port. This way the power and the data (say for hdmi and usb) pass through to the notebook and I do not need to use a seperate power supply on the power port?

Hope I'm not being to slow, otherwise you could pass me your dunce cap :-)

Willi
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08-05-2018

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Re: T480 connection to Thunderbolt 3 Dock

2018-08-06, 16:18 PM

Nevermind. It worked!

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09-12-2018

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Re: T480 connection to Thunderbolt 3 Dock

2018-09-12, 19:01 PM

I literally registered just to say THANK YOU!

 

You are not a dunce -- or we both are. That second port can be some sort of two-part plug so it really doesn't look like an additional Thunderbolt port, and the little thunderbolt icon is directly between the two different ports so that's not particuarly helpful... But as soon as I plugged in to that second port, everything worked perfectly. 

 

I literally NEVER would have thought to plug into that second port without this post, so thank you!!

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11-01-2018

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Re: T480 connection to Thunderbolt 3 Dock

2018-11-01, 9:42 AM

and me too registered to say thanks....abslutely !

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Re: T480 connection to Thunderbolt 3 Dock

2018-11-01, 14:11 PM

 wrote:

I literally registered just to say THANK YOU!

 

You are not a dunce -- or we both are. That second port can be some sort of two-part plug so it really doesn't look like an additional Thunderbolt port, and the little thunderbolt icon is directly between the two different ports so that's not particuarly helpful... But as soon as I plugged in to that second port, everything worked perfectly. 

 

I literally NEVER would have thought to plug into that second port without this post, so thank you!!


Yeah, it's odd, since on the X series laptops (at least the X1 Carbon 6 and the X280), both ports are Thunderbolt 3.

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11-09-2018

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Re: T480 connection to Thunderbolt 3 Dock

2018-11-09, 22:42 PM
I spend like 5 hours trying to makes this work! Who in the world create two thunderbolts in a laptop and one just for power... LENOVO PLEASE!!!!
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Re: T480 connection to Thunderbolt 3 Dock

2018-11-13, 20:30 PM

 wrote:

 wrote:

I literally registered just to say THANK YOU!

 

You are not a dunce -- or we both are. That second port can be some sort of two-part plug so it really doesn't look like an additional Thunderbolt port, and the little thunderbolt icon is directly between the two different ports so that's not particuarly helpful... But as soon as I plugged in to that second port, everything worked perfectly. 

 

I literally NEVER would have thought to plug into that second port without this post, so thank you!!


Yeah, it's odd, since on the X series laptops (at least the X1 Carbon 6 and the X280), both ports are Thunderbolt 3.


I need to retract my statement. It appears the X280 is also one USB-c (gen1), one TB3. This is somewhat disappointing, since it implies the TB3 controller inside of that laptop is also the x2 PCIe lane variety. The X1C6 has 2 TB3 ports, and I made the faulty assumption this was true of all X series laptops.

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