Ubuntu 20.04 Display Link with Ryzen (integrated graphics) SLOW refresh rate

[spectrum]

I have same problem on Lenovo Thinkpad E495 (Ryzen 7 3700U)

[myersrj]

Hi there

I have been able to run 20.04 without tearing by using the amdgpu-pro video drivers instead of the open source ones that come by default with Ubuntu.

Driver can be found here: "https://www.amd.com/en/support/kb/release-notes/rn-amdgpu-unified-linux-20-20"

Just extract to a directory and run the command "sudo amdgpu-pro-install -y" and then reboot.

Only thing to be aware of is if you try and use only the external monitor with your computer screen off you will get 3 sec delay on clicks.

To make it work perfectly make sure the screen of the computer your DisplayLink is plugged into is never off.

Hope this helps.

[ozcho]

Originally Posted by myersrj

Hi there

I have been able to run 20.04 without tearing by using the amdgpu-pro video drivers instead of the open source ones that come by default with Ubuntu.

Driver can be found here: "https://www.amd.com/en/support/kb/release-notes/rn-amdgpu-unified-linux-20-20"

Just extract to a directory and run the command "sudo amdgpu-pro-install -y" and then reboot.

Only thing to be aware of is if you try and use only the external monitor with your computer screen off you will get 3 sec delay on clicks.

To make it work perfectly make sure the screen of the computer your DisplayLink is plugged into is never off.

Hope this helps.

I've tried this solution and worked perfectly.

Thank you very much man!

[fitter]

Hmm, I need to also thank you @myersrj
Ubuntu 20.04, kernel 5.4.0-53, CPU Ryzen 5 3500U, wayland here. I have now connected two Full-HD screens via the docking station. Everything works flawlessly, no audio glitches and CPU usage by displaylink stays between 5-20%, which is completely acceptable.

Interesting fact is that I actually tried AMD-distributed driver few weeks ago (the same version), but it was not working properly. Recently I disabled the "legacy boot" on my machine in order to fix different problem with black screen on boot. Seems like it played some role in fixing my problem.

[qnarkill]

amdgpu-pro driver fixed the lag issue when the laptop was open but ruined the performance. Uninstalled it and back to waiting for a fix.

[ff801]

so... things are still broken?

when can we expect a fix?

best regards

[devnull10]

Originally Posted by ff801

so... things are still broken?

when can we expect a fix?

best regards

Yes - I've just done a fresh install to see, and everything still the same, months on with no progress.