Sorry, I did not inform right, I loaded
sudo loadkmap < /usr/share/kmap/de_CH-latin1.kmap
and nothing happened. When I have an ls in /usr/share/kmap/de_*, I get the following:
4 -rw-r--r-- 1 root root 2823 Jul 5 2008 de-latin1.kmap
4 -rw-r--r-- 1 root root 2823 Jul 5 2008 de.kmap
4 -rw-r--r-- 1 root root 2823 Jul 5 2008 de_CH-latin1.kmap
4 -rw-r--r-- 1 root root 2823 Jul 5 2008 defkeymap.kmap8
4 -rw-r--r-- 1 root root 2823 Jul 5 2008 defkeymap_V1.0.kmap
So it looks that the keyboard files are there. But when I load one, I see no change in the keyboard. Do I have to reset x server?