[SOLVED] Funny behavior of the root password

Hello
I noticed that strange thing, I have a root password with lower cases. If I strike the keys with the keyboard in lower case the password is refused. If I strike the keys with the keyboard in upper cases and the shift key pushed, it works. I have a Swiss keyboard (QWERTZ).
So you have to remember the password plus the state of some keys ! It's a little too hard for me.
I noticed that strange thing, I have a root password with lower cases. If I strike the keys with the keyboard in lower case the password is refused. If I strike the keys with the keyboard in upper cases and the shift key pushed, it works. I have a Swiss keyboard (QWERTZ).
So you have to remember the password plus the state of some keys ! It's a little too hard for me.