In latest Precise live system if I run any GUI command with sudo prefix, I get can not open display error message

[Hammer Attila]

Hy,

Jeremy, thank you the confirmation for Unity too.
Rob, unfortunately su -c command suggestion doesn't help. After I change 
root password and run for example su -c gedit command, I get following 
error message the live CD:
EggSMClient-WARNING **: Failed to connect to the session manager: None 
of the authentication protocols specified are supported


** WARNING **: Could not connect to session bus
ubuntu at ubuntu:~$

Attila