root@cm-x270:~$ Xfbdev
_XSERVTransSocketOpenCOTSServer: Unable to open socket for inet6
_XSERVTransOpen: transport open failed for inet6/cm-x270:0
_XSERVTransMakeAllCOTSServerListeners: failed to open listener for inet6
error: Invalid argument

Fatal server error:
no screens found
root@cm-x270:~$