Lagging external single display on Ubuntu 20.04

[adam91]

Dear DisplayLink community,

everything works fine with the "DisplayLink USB Graphics Software for Ubuntu 5.3.1" (options "Join Displays", "Mirror") except the settings option "Single Display" when I want to use only the external display: I face massive lagging.
Everything works when I am using the built-in display as a single display.

Thanks in advance for considering my hint!

Hardware:
Dell Inspiron 13 5000 Series

Processor: Intel® Core™ i7-8550U CPU @ 1.80GHz × 8
Graphics: Mesa Intel® UHD Graphics 620 (KBL GT2)
OS: Ubuntu 20.04 LTS
OS Type: 64-bit
GNOME Version: 3.36.2
Windowing System: X11

Dell D3100 USB Docking station
Iiyama North America 24" Display

Output of Linux support tool:
Traceback (most recent call last):
File "DLSupportTool.py", line 358, in <module>
File "DLSupportTool.py", line 350, in main
File "contextlib.py", line 17, in __enter__
File "DLSupportTool.py", line 228, in zip_folder
File "os.py", line 157, in makedirs
OSError: [Errno 22] Invalid argument: 'DLSupportTool_Output_2020-07-05T18:15:42.984301'
[29457] Failed to execute script DLSupportTool

[LnxUsr]

Had the same issue, try using Wayland instead. It seems that development is focusing on it anyway. Works way better and I'm getting similar performance to Windows. Most X11 applications work fine out of the box using XWayland...