Go Back   DisplayLink Forum > DisplayLink Graphics Technology > Linux and Open Source

Thread Tools Search this Thread Display Modes
Old 05-13-2020, 08:19 PM   #1
Junior Member
Join Date: May 2020
Posts: 1
Default 1 out of 2 external displays lagging on Ubuntu 20.04

Hey, I am running Ubuntu 20.04 and Windows 10 on my ThinkPad E595 (AMD Ryzen 5 3500U with AMD Radeon Vega 8 graphics). I have two external monitors plugged into it via the Toshiba Dynadock. On Windows 10 it works like a charm, but on Ubuntu 20.04, the monitor plugged into the Docking station is constantly lagging, but the monitor plugged into the laptop is fine.

Below are the files from the troubleshooting tool.
Attached Files
File Type: zip DLSupportTool_Output_2020-05-13T22:11:37.127031.zip (366.8 KB, 0 views)
Axodus is offline   Reply With Quote
Old 05-15-2020, 06:04 AM   #2
DisplayLink Tech Support
JakubDabrowski's Avatar
Join Date: Jan 2020
Location: Katowice, Poland
Posts: 169


Thank you for contacting us on the forum.

Could you please tell me how extensive are the lags? Are they around 1s delay? If possible, could you record a video for us to see them?

As a possible solution, please try using Wayland and let me know if this has helped in any manner or the issue is exactly the same.

Thank you for your actions and feedback.

Best regards,

Last edited by JakubDabrowski; 05-15-2020 at 06:06 AM.
JakubDabrowski is offline   Reply With Quote
Old 05-19-2020, 08:56 AM   #3
Junior Member
Join Date: May 2020
Posts: 1


I am using a ThinkPad E595 with Ubuntu 20.04 as well (Ryzen 7 with Radeon RX Vega 10 Graphics) and experience the same issues. It is not only about lag but an extremely choppy and laggy image. The issue seems to be related to the Ryzen Processors and the EVDI Interface, as can be found here: https://github.com/DisplayLink/evdi/issues/164.

The link also includes a video that is an exact representation of my current experience.

I can confirm that the problem is the same when using Wayland, maybe a tiny bit better but still unusable.

I really hope this issue can be solved in the near future.
alhae is offline   Reply With Quote
Old 05-25-2020, 06:23 AM   #4
Junior Member
Join Date: Mar 2020
Posts: 1
Default Display Link Lag/Stutter with Ryzen

I have the same problem with my AMD Ryzen 5 3500U with AMD Radeon Vega 8 graphics. Problem is not an issue on Intel only Ryzen (tested same image against my Intel).

On Ubuntu 20.04 stuttering/tearing/lagging exists on both X Org and Wayland making it unusable.
This problem has existed for some time and I have seen it on 18.04, 19.04 and 19.10 when using the X Org drivers. When using the Wayland drivers on 19.04 the problem went away (The configuration I am using now).

The below link shows a picture of a laggy/tearing screen when you move a window from left to right. (I copied this from the website mentioned above)


Given that the Laptop screen and HDMI port work fine I am assuming this is an issue with the Display link driver.

I am very keen to resolve this issue and am willing to promptly provide any information required to debug this. I am technically minded and have reasonable Linux skills.

Please let me know the next steps.

Regards Ralph.

Last edited by myersrj; 05-28-2020 at 11:04 PM.
myersrj is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT. The time now is 06:27 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.