% xorg -help
-allowMouseOpenFail    start server even if the mouse can't be initialized
-bestRefresh           choose modes with the best refresh rate
-ignoreABI             make module ABI mismatches non-fatal
-isolateDevice bus\_id  restrict device resets to bus\_id (PCI only)
-version               show the server version
vtXX                   use the specified VT number
-keeptty               don't detach controlling tty (for debugging only)
-novtswitch            don't immediately switch to new VT
-sharevts              share VTs with another X server