Why can't I raise the priority level in 12.04 in gnome-system-monitor

Question

When I go to raise a priority level it displays this

I know it says permission denied, but is this a bug? I can lower it but not raise it. Is this normal?

EDIT: I think this might be a bug, because the only limitation is states in the help value is you can't set it to something less than 0, but I'm not sure if doing something else wrong

Answer 1

Running as a normal user, this is normal. You can only raise priorities as a super user.