Horizontal artifacts when refreshing
 

Hi,

i use a dock for many months with an acer computer on ubuntu 24 and all is working fine.
But I bought a new dell inspiron and i encoutered bad glitches when screens are refreshing.
Its a dual boot windows11 + ubuntu, and on windows without any driver, it works fine, no glitches. So, its not a hardware problem to my mind.
My other computer with the same version of ubuntu works great also it comes from the dell computer. But how to resolve this? Can you help me please?
As to me its a refresh probleme because when a drag the mouse it refresh the part of the screen.

Thank you so much.

computer: https://www.dell.com/fr-fr/shop/ordi...ptop/bn74714sb
driver: https://www.synaptics.com/products/d...wnloads/ubuntu

I've tried to install intel graphics third party driver and wow, it was a disaster!
I've tried to install a legacy displaylink driver but same horizontal f... lines when i drag any window.
I've tried to install ubuntu 22 and....it works fine...

Any other idea to test on ubuntu 24??

Attachment 4508

I'm experiencing the same issue. Ubuntu 22.04, on a System76 Darter Pro, using the latest DisplayLink driver from the apt repo

Same experience, unfortunately :/
 

Hardware CPU/GPU: AMD Ryzen 7950X + RX 6800XT (computationally, very capable setup)

Ubuntu 22.04 - no issues on DisplayLink 5.6 (I think it was the version installed)
Ubuntu 24.04 - DisplayLink 6.1, awful horizontal artefacts appear like when I had (in the past) very low performance graphics card installed

Artefacts are particularly visible when moving around browser window with a white page over non-white.

I remember such experience having those artefacts when had different, much less capable graphics card - Radeon Pro WX 2100

I have the same error. :(
 

I have the same error. :(

I also have horizontal white artifacts.

Device: Lenovo ThinkPad L16 Gen 1
OS: Ubuntu 24.04.1 LTS
Docking Station: Lenovo Hybrid USB-C with USB-A Dock
Setup: two LG screens (model 24BP45SP) connected to the dock
Graphics: Intel® Graphics (MTL)

I tried both the repository and the direct download version of Displaylink. The file "DLSupportTool.sh" I could not find.

Same issue
 

Dell Latitude 5450
Intel Core Ultra 7 165H x 22
Intel Arc Graphics (MTL)

Dell D6000 Dock with two DP monitors

Fedora 41
64-bit
Gnome 41
Wayland (issue appears on X also)
Linux 6.12.11-200.fc41.x86_64

But the issue has been happening since installation. :(
No issues when using two external monitors without DisplayLink

Same here:

Ubuntu 24.04
System76 Darter Pro
DisplayLink driver v6.1.1

Video: https://youtu.be/5B-NBUseuXE

Re: Horizontal artifacts when refreshing
 

Made an account just to post here that I am also experiencing the same issue.

The youtube video in the previous reply by natewiebe13 is exactly what I am experiencing on a machine running a fresh install of Ubuntu 24.04 and latest displaylink-driver provided from the synaptics website and followed the instructions to a tea. Horizontal artifacts when sections of the screen refreshes.

I can confirm that my dock and USB cable are not the problem since this works completely fine on a separate machine running Ubuntu 22.04 & displaylink-driver 6.1.1-17. This seems to be an issue related to Ubuntu 24 and how the driver interacts with that version exclusively.

I've scoured evdi issues and source code on github trying to find the problem to no avail. I believe the issue is within the driver proprietary code that is under lock and key.

If you need more information, I'm subscribed to this thread and eager to reply to get it resolved. Please help!

More glitches here
 

Hi,

I'm running Ubuntu 24.04.3 LTS with displaylink-driver-6.2.0-30 on an HP ZBook Ultra G1a. With every USB-C docking station with DisplayLink tech inside I get small horizontal glitches when moving windows around. Small movements will eventualy resolve this but scrolling in a browser is horrific. When using an docking station with USB-C alt-mode support all is fine and crispy.

https://photos.app.goo.gl/xmearD8q4BCPhd6XA

What has to be done to fix this?

Hello René,

It appears like an EVDI issue that we currently investigate and it is discussed in github:
https://github.com/DisplayLink/evdi/issues/524

Regards,
Szymon