black screen - no mouse pointer available

Hi to all,

After upgrading to linux-3.2.0-75 i had to reinstall the 2015 beta relaease, so i download the .deb file today, the installation run without any error, the migration utility import all my settings.
So now whats going wrong:

the mouse pointer can be seen on all icons and all  menues, and you  can chosse them all, but in the modell windows you cant see him.

If you draw a line (that one you cant see :) ) in the command-line-window i see the normal commands.

Has anyone an idea, how can i fix it?

 

Linux 3.2.0-75-generic #110-Ubuntu  x86_64 GNU/Linux

KDE 4.8.5

DS V1R5.2 beta

 

Danke