dlopen: /usr/local/lib/xorg/modules//libwfb.so: Undefined symbol "miZeroLineScreenIndex" (EE) Failed to load /usr/local/lib/modules//libfw.so (EE) Failed to load module "wfb" (loader failed 7) Fatal server error: Caught sigal 11. Server aborting Abort trap: 6 (core dumped) Any idea what is causing this or how to fix it ?