High CPU usage, Mouse non smooth

[giuliocoluccia]

Hi,
I'm running ubuntu 14.04.3 with latest kernel & Xorg:

giulio@caratinga:~$ uname -r
3.19.0-37-generic
giulio@caratinga:~$ X -version

X.Org X Server 1.17.1
Release Date: 2015-02-10
X Protocol Version 11, Revision 0
Build Operating System: Linux 3.19.0-28-generic x86_64 Ubuntu
Current Operating System: Linux caratinga 3.19.0-37-generic #42~14.04.1-Ubuntu SMP Mon Nov 23 15:13:51 UTC 2015 x86_64
Kernel command line: BOOT_IMAGE=/vmlinuz-3.19.0-37-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
Build Date: 11 September 2015  10:33:14AM
xorg-server 2:1.17.1-0ubuntu3.1~trusty1 (For technical support please see http://www.ubuntu.com/support) 
Current version of pixman: 0.30.2
	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.

I'm experiencing the following issues. I have a DVI monitor plugged to a USB 3.0 docking station, which I use as my only monitor (the laptop lid is closed). The first is the high CPU usage of /usr/lib/displaylink/DisplayLinkManager which ranges from 20 to 60 percent (problem disappears if I unplug the dock). The second is the mouse movement which is not smooth on the external monitor, but it is on the integrated display and also on the same monitor when plugged to the mini DisplayPort.

I attach the result of the Linux Support Tool.

Thank you