[Xpert]How to get the XF86_FBDev server in Xfree86 4.1.0?

[cdy]

Dear Sirs:   I want to use the Frame buffer on XFree86 4.1.0.   I want to how to modify the config file in xc/config/cf (which one)    to get the XF86_FBDev server ?  Chendy