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

[Daniel van Vugt]

https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/-/merge_requests/2
https://gitlab.freedesktop.org/xorg/driver/xf86-video-amdgpu/-/merge_requests/62

** Bug watch added: gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/-/issues #553
   https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/-/issues/553

** Also affects: nouveau via
   https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/-/issues/553
   Importance: Unknown
       Status: Unknown

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

Title:
  Ubuntu 20.04 and Displaylink is extremely slow

Status in Nouveau Xorg driver:
  Unknown
Status in OEM Priority Project:
  New
Status in X.Org X server:
  Unknown
Status in nvidia-graphics-drivers-470 package in Ubuntu:
  New
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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