1 second lag

[triplemaya]

New install of ubuntu mate 20.04
installed displaylink with
displaylink-driver-5.3.1.34.run
install goes fine
Monitor is connected to docking station with displayport cable.

PROBLEM
key presses and mouse clicks take about one second to register. So the system is unusable.
Mouse movement is fine

This is only the case when the large monitor is set to primary and the laptop screen is off. When the system is running with two monitors there is no problem.
This configuration works perfectly when laptop is directly connected to large display with displayport cable.

Symptom present on three different docking stations, so not a hardware issue there.
All versions of hardware working perfectly in this configuration with ubuntu mate 18.04

[billkoolguy]

There is a patch released to fix this on Ubuntu 20

https://github.com/DisplayLink/evdi/issues/181 thread of others with same issue

https://www.displaylink.org/forum/sh...ad.php?t=67148 patch link

I still need the patch for 18, so same problem for me needing to keep the primary display on....

[triplemaya]

Hi Bill

Many thanks for this. A googled a lot but did not find the jan logged bug on github.

Works perfect now.

Very bad luck if you have the problem with 18. My 18.04 MATE installations run just fine.

Andrew

[thopiekar]

Originally Posted by billkoolguy

There is a patch released to fix this on Ubuntu 20

https://github.com/DisplayLink/evdi/issues/181 thread of others with same issue

https://www.displaylink.org/forum/sh...ad.php?t=67148 patch link

I still need the patch for 18, so same problem for me needing to keep the primary display on....

Very useful. I'll look into this and see whether we can't make any use of the patch in an easy way

However, I'll only put focus on Ubuntu 20.04 (or whatever I run at the moment).

[triplemaya]

Works perfectly out of the box on 20.04

[thopiekar]

Originally Posted by triplemaya

Works perfectly out of the box on 20.04

You mean DisplayLink's patched package? I'm not sure how their changes influence other packages which are built from the same source. Nevertheless, I'll add it to my PPA next to the evdi packages.

[triplemaya]

I mean the XServer Patch

DisplayLink XServer Patch (20.04)

https://www.displaylink.com/downloads/file?d=310

And certain updates overwrite it so you have to do it again.