rh9 如何不使用root帐号运行GTK程序?

onnoLinux

新装的rh9,遇到stardic2,D4X等GTK程序,无法用非root帐号运行.显示

[code:1]
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified


(d4x:21827): Gtk-WARNING **: cannot open display:
[/code:1]
请问该如何解决?

luoda

man xhost