Ubuntu – Gtk-warning cannot open display


I run ubuntu 10.04 and I'm trying to disable suspend and hibernate mode so I typed this:

sudo gedit /usr/share/polkit-1/actions/org.freedesktop.upower.policy

but I get this error:

Gtk-WARNING **: cannot open display:

Anyone know what the problem is?

Best Answer

  • for graphical applications, such as gedit, you should use gksu

    gksu gedit /usr/share/polkit-1/actions/org.freedesktop.upower.policy

    alternately, you can try nano

    sudo nano /usr/share/polkit-1/actions/org.freedesktop.upower.policy