[Bug 1875015] Re: Ubuntu 20.04 and Displaylink is extremely slow

[Bas Prins]

Hi aaron, after building up my hate again towards microsoft for two
months (bought a new fancy laptop, upgraded to windows11, and my screens
connected via display link went dark from time to time, no fix, really
freaking annoying), I thought %&#$ this, I'll try ubuntu one more time.

Installed 20.04, downloaded the drivers for displaylink. Went through
all the misery listed above.

Installed 21.10, downloaded the beta drivers from display link. Bam.
Works like a charm.

So if you are able to upgrade to 21.10, it might be the fix for you too

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Title:
  Ubuntu 20.04 and Displaylink is extremely slow

Status in Nouveau Xorg driver:
  Unknown
Status in OEM Priority Project:
  New
Status in xf86-video-amd:
  Unknown
Status in X.Org X server:
  Unknown
Status in nvidia-graphics-drivers-470 package in Ubuntu:
  Confirmed
Status in xorg-server package in Ubuntu:
  Fix Released
Status in xserver-xorg-video-amdgpu package in Ubuntu:
  In Progress
Status in xserver-xorg-video-nouveau package in Ubuntu:
  In Progress
Status in xorg-server source package in Focal:
  In Progress
Status in xorg-server source package in Hirsute:
  In Progress
Status in xorg-server source package in Impish:
  Fix Released

Bug description:
  Using ubuntu 20.04 on displaylink docking with external monitor is
  totally slow, unusable. The GUI responds very slow, if you click, the
  command of the click goes on after about 3 seconds... if you type, all
  the letters are with the same lag, so it is totally unusable.

  Was using displaylink without any problem on 19.10 until yesterday, when I upgraded to 20.04. 
  It is terrific.

  If i plug out the usb for the displaylink docking station, than the
  speed is back, and the system is ok, if I connect it to the docking
  station again, everything extremely slow again.

  Please investigate this asap, as it is unusable on displaylink docking
  stations.

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