in Ubuntu, when there’s menu active or visible, pushing ‘Print Screen’ won’t have any effect. It applies to taskbar, context menus, right-click and other menus. But I have a workaround on this one:
Simply let Gnome automatically take the screenshot, and delay the action.
In your terminal, type:
The number 5 represents the number of seconds before Gnome automatically take the screenshot. After typing the command, go to the window or menu that you would like to take the screenshot of.
Thanks for being one of my top droppers for Nov 2008!