Thx I try it later at the moment i am not at home...
After I worked about one hour on the PC... I have the feeling that the PC is slower... the dock is bucking a little...
The Systeminfo show this
Chipsatz-Modell: Intel HD Graphics 3000 Typ: GPU Bus: Integriert VRAM (gesamt): 384 MB VRAM (dynamisch, maximal): 10 Hersteller: Intel (0x8086)
Is the Vram 384MB too little?
And one question... is the radeon disabled in the dsdt?