hostname: Der Name oder der Dienst ist nicht bekannt
xauth:  file /home/janolezab/.serverauth.3957 does not exist

(EE) 
Fatal server error:
(EE) Cannot move old log file "/var/log/Xorg.0.log" to "/var/log/Xorg.0.log.old"
(EE) 
(EE) 
Please consult the The X.Org Foundation support 
	 at http://wiki.x.org
 for help. 
(EE) 
xinit: giving up
xinit: unable to connect to X server: Connection refused
xinit: server error
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xinit failed. /usr/bin/Xorg is not setuid, maybe that's the reason?
If so either use a display manager (strongly recommended) or adjust /etc/permissions.local