Kicad 4.0.7 doesn't display its graphics properly

[alexandros]

After upgrading to UbuntuStudio 18.04, Kicad 4.0.7 won't display its graphics properly, neither Eeschma, not Pcbnew.
As the mouse moves around the screen displays the cross that follows it many times (image won't refresh), in both Eeschema and Pcbnew, and Pcbnew won't show the actual board designs.
Reading various fora, it seems to be a problem with Python (wxpython?) between Kicad and the new Ubuntu.
The attached image is a screen shot from Pcbnew, that shows how the program displays circuit board designs.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: kicad 4.0.7+dfsg1-1ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-20.21-lowlatency 4.15.17
Uname: Linux 4.15.0-20-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu May 10 16:26:01 2018
InstallationDate: Installed on 2017-09-21 (230 days ago)
InstallationMedia: Ubuntu-Studio 17.10 "Artful Aardvark" - Alpha amd64 (20170829)
SourcePackage: kicad
UpgradeStatus: Upgraded to bionic on 2018-05-04 (6 days ago)