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

[Łukasz Spintzyk]

It should be for intel gpu based machines. For nvidia and amd we need to
wait until community will upstream corresponding part to nouveau and
amdgpu xserver DDX drivers.

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Title:
  Ubuntu 20.04 and Displaylink is extremely slow

Status in X.Org X server:
  Unknown
Status in xorg-server package in Ubuntu:
  Fix Committed
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 Committed

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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