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13 Posts

04-28-2019

DE

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ThinkPad 490s Display Problems with Docking Thunderbolt Gen 2

2019-06-25, 17:22 PM

Hi,

after figuring out, that the USB-C Gen2 Dock does not support 4k and something else output with a T490s, I got a Thunderbolt Dock Gen2.

I am using a BenQ EW3270U and Samsung U28E590 (2x 4k) now and have some serious issues with dock working with the T490s.

 

When my notebook is closed and not used for some time (so I guess it is off/deep standby) and I connect it with the dock via thunderbolt port, the dock recognizes it, the laptop LED indicator shows charging and I turn on the system via the dock. Then the fan of the notebook turns on, but the monitors usually stay in standby. Sometimes I have a half image on one of the screens with black lines in it (mouse not moving/frozen). I can reconnect the dock with the notebook and sometimes it works then and sometimes not (hard restart via notebook power button - long press - is necessary).

 

Furthermore, when the system is running "fine", the screens suddenly turn black, the notebooks makes a sound and it seems like it has lost the connection to the dock. Then the monitors get a signal again at once, but the power led does not show charging anymore (and windows actually shows that the notbook is running on battery now).

 

To be honest, I don't even have a clou where to start to figure out this mess. Pretty expensive setup just not working flawlessly together is a pain!

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8 Posts

06-24-2019

CN

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Re: ThinkPad 490s Display Problems with Docking Thunderbolt Gen 2

2019-06-27, 10:42 AM

Dear Customer,

1. Please help provide system config version such as

BIOS version:

Embedded Controller Version:

VGA driver:

ps:1. BIOS and Embedded Controller Version you can find in msinfo32.( Win+r, insert "msinfo32", click OK)

     2.VGA driver version you can find in Device manager -> Display adapters->right click "intel UHD Graphics xx"->Driver sheet

2. Suggest you'd better update system config under "Lenovo vantage", then check that whether it can dupliate your problem again.

 

 

 

 

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13 Posts

04-28-2019

DE

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Re: ThinkPad 490s Display Problems with Docking Thunderbolt Gen 2

2019-06-28, 20:08 PM

Thanks for your quick response.
BIOS Version is N2JET31W (1.09) of March 15th 2019
Embedded Controller Version is 1.06
VGA driver of intel uhd graphics 620 is 25.20.100.6581

I did check updates via Lenovo System Update App just the other day. But I am not sure about the Dock, how do keep that up2date on a regular basis?

 

EDIT: At least I updated the Dock Firmware from apperently version 1.5 to 3.1.61

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13 Posts

04-28-2019

DE

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Re: ThinkPad 490s Display Problems with Docking Thunderbolt Gen 2

2019-07-03, 17:02 PM
The Problem still excists.
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8 Posts

06-24-2019

CN

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Re: ThinkPad 490s Display Problems with Docking Thunderbolt Gen 2

2019-07-09, 6:34 AM

Hi customer, sorry for reply you late.

Suggest you update TBT SW and FW, then reset system via poking the reset hole on the bottom of system, please refer to attached photo.

TBT SW and FW please refer to below link:

https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-t490s-type-20nx-20ny/downloads

As for DOCK FW, we will release one  new version, once released i will notice you

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8 Posts

06-24-2019

CN

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Re: ThinkPad 490s Display Problems with Docking Thunderbolt Gen 2

2019-07-09, 6:39 AM

add TBT FW and SW file name in the link above

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13 Posts

04-28-2019

DE

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Re: ThinkPad 490s Display Problems with Docking Thunderbolt Gen 2

2019-10-01, 15:13 PM
Thanks, I actually just updated and also found a new FW for the dock: https://pcsupport.lenovo.com/us/en/downloads/DS505188
Unfortunatly, when I try to install it, it always fails with just "error" at around 87% when "enabling xhci. I hope that the problems go away with the new drivers for the T490s though, otherwise I will have to send the machines in.
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