Hi, I am on 21.10 with intel driver and latest displaylink from their
website. Everything used to work decently until a couple of day ago when
I started seeing the external monitor very slow. I was on 21.04 and
after  an update it has started being slow.

1. It is slower when more things change on the screen, only the mouse works 
slow a full screen rendering is unusably slow.
2. on the login screen the screen works very well, as I was used to.
3. Audio work fine, rendering is very slow

About my pc

1. Linux vin 5.13.0-20-generic #20-Ubuntu SMP Fri Oct 15 14:21:35 UTC 2021 
x86_64 x86_64 x86_64 GNU/Linux
2. Driver from display link displaylink-driver-5.4.1-55.174
3. Tried X11 and Wayland from GDM with Gnome

I tried to troubleshoot as described here
https://wiki.archlinux.org/title/DisplayLink and setting
LIBGL_DRI3_DISABLE=true as said here but it does not change

Any hint is appreciated! 
Thank you

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https://bugs.launchpad.net/bugs/1875015

Title:
  Ubuntu 20.04 and Displaylink is extremely slow

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