At least every Linux system that I worked with used the convention to switch to the non-graphical consoles by Ctrl-Alt-F1, Ctrl-Alt-F2 and so on.
Recently, I installed CentOS 6.3 on a machine. The installation is non-customized and uses Gnome 2.
To my surprise Alt-F4 switches to console. Alt-F1 then brings you back to the XServer. How can I change the keybinding to Ctrl-Alt instead of simply Alt?
It also seems to bypass Gnome's key bindings. In Gnome, I tried to define Alt-F4 as close window, but it does not work but still switches to the console.