I tried to disable compiz, but still the same problem. I found in Synaptic history, that in those days I only added skype and w64codecs, updated libraries like telepathy and libboost. Nothing more. Video drivers are installed since two months and there have been no changes in them. I tried to disable / enable pulseaudio, but nothing to do. I tried to reinstall the Emulator, no way. Finally I uninstalled WINE and reinstalled. But still it doesn't work. Definitely I have no more ideas.
