Hi, At the begining i would like to appologize for my English. My system : Release: Ubuntu 11.10 64 (oneiric) GNOME: 2.32.1 (Ubuntu 2011-04-14) Kernel: 3.0.0-17-generic (#30-Ubuntu SMP Thu Mar 8 20:45:39 UTC 2012) My Hardware: CPU: Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz Memory: 3873 MiB GPU1: Intel (propably) i915 GPU2: NVidia Optimus GT525M Wine 1.5.1 After few minutes (5 - 20 min) of playing Mafia 1 my hole system freeze even alt+ctrl+del or CapsLock not respond. I have to restart computer by using button or take out batery. To play i must copy libGL.so.1 from /usr/lib32/libGLU.so.1 to /usr/lib/ because it isn't there. Can any one help me resolve this problem or which information will be useful to do that ?