While searching the net again about this problem I came across this post: http://ohioloco.ubuntuforums.org/showthread.php?p=8337536
Apparently the problem is a incompatibility with compiz. After I tried "metacity --replace&" at the command line, blender is working fine, no screen corruption. Rendering is working too.
While searching the net again about this problem I came across this post: http:// ohioloco. ubuntuforums. org/showthread. php?p=8337536
Apparently the problem is a incompatibility with compiz. After I tried "metacity --replace&" at the command line, blender is working fine, no screen corruption. Rendering is working too.