ubuntu 18 - extremely glitchy normally, works flawless with software rendering

[KatarzynaCzaja]

Hello,

Thank you for reaching out to us!

Please follow the steps below and let me know if the issue has gone away:

Disable PageFlip for modesetting
It is preferred to keep using "modesetting" driver, but disabling page flipping is necessary.
To do this, as a root user create a file 20-displaylink.conf under:

/usr/share/X11/xorg.conf.d/

with the following content:

Section "Device"
  Identifier "DisplayLink"
  Driver "modesetting"
  Option "PageFlip" "false"
EndSection

A reboot is required for the setting to be effective.

Best regards,
Katarzyna