Thanks Chris, works perfectly with this option. However, I use option Standard for Look & Feel, also tried Mac, I get the crash in both cases (without the change in XF86Config). > If your X server is using the mga driver and X Window Look & Feel is > enabled (this is not the default), you may find that your X server crashes. > You can work around this problem by adding this line to the mga Device > section: > > Option "XaaNoScreenToScreenColorExpandFill"