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AaronRM
Fanfold Paper
Posts: 3
Registered: ‎06-28-2019
Location: US
Views: 383
Message 1 of 4

Dual 4k UHD with T480s + ThinkPad Hybrid USB-C with USB-A Dock

I just obtained new LG 4K displays. I have them hooked up to a ThinkPad Hybrid USB-C with USB-A Dock via DisplayPort. The dock is connected to a T480s (20L7) via USB-C. I am running the monitors at 3840x2160 @ 60Hz.

 

The performance is a bit laggy at times...it almost feels like I'm pushing the limits of what the laptop/dock can support. I have the latest drivers and firmware installed for both the laptop (via Lenovo's System Update utility) and dock.

 

Even doing basic operations in Windows like showing the Start menu, Windows + TAB, etc... cause the WUDFHost.exe process (Windows Driver Foundation - User-mode Driver Framework Host Process) to spike up to 10% CPU / 100 % GPU. 

 

Anyone else running with a similar setup? Any suggestions (short of getting new hardware) that I can do to boost the performance with my existing setup?

Guru
Posts: 1,998
Registered: ‎02-27-2012
Location: EC
Views: 371
Message 2 of 4

Re: Dual 4k UHD with T480s + ThinkPad Hybrid USB-C with USB-A Dock

Hi AaronRM

 

I don't have that dock to try it out. But it looks to me, reading the Lenovo driver documentation that it uses the DisplayLink chipset for video.

 

Here it is the support site for the dock that you may already know about:

https://support.lenovo.com/us/en/solutions/pd500180

 

There is also the manufacturer drivers of the DiplayLink chipset. Give it a try to see if there is any performance improvement.

https://www.displaylink.com/downloads/windows

 

My second test would be to try your same configuration (dock and monitor) on a different computer, and check out if it produce different results, or the same.

 

Regards












Martín Itúrbide
OS2World.com NewsMaster
Self-proclaimed Trackpoint Fan Club President
"Don't Panic" 
Wil Wheaton
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AaronRM
Fanfold Paper
Posts: 3
Registered: ‎06-28-2019
Location: US
Views: 357
Message 3 of 4

Re: Dual 4k UHD with T480s + ThinkPad Hybrid USB-C with USB-A Dock

Thank you for the suggestions.

 

I have installed both the latest Dock Driver and Firmware for the Hybrid USB-C with USB-A Dock from the dock's support site.

 

I also already have the latest DisplayLink drivers (v.9.1.1644.0).

Guru
Posts: 1,998
Registered: ‎02-27-2012
Location: EC
Views: 302
Message 4 of 4

Re: Dual 4k UHD with T480s + ThinkPad Hybrid USB-C with USB-A Dock

Hi

 

So, do you still have the laggy issue?


Do you want to try the dock on a different computer and check if the same problem occur?


Regards












Martín Itúrbide
OS2World.com NewsMaster
Self-proclaimed Trackpoint Fan Club President
"Don't Panic" 
Wil Wheaton
Remember: Your Friend Wil Declares....
Please click "Kudos" for Ego Boost !!


 

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