Īccording to some people suggestions online in some of the above mentioned files I was about to look for some commands which are related to deal with the X server.Īfter checking up the suggested files, I’ve found in my. After my upgrade from Debian testing/unstable to Debian GNU/ Linux wheezy/sid I started experiencing an annoying message after each user login saying:Īfter a bit of investigation online I’ve figured out that the possible causes for the message Cannot open display “default display” are definitions in either /etc/profile, /home/myuserdir/.profile or /home/myuserdir/.bashrc.