Unable to use umlaut key combos

[ili]

What keyboard layout do you have selected in settings?

There was nothing selected.

I first tried English (US), which did not help.
Then tried English Western European AltGr dead key, better.

But I now get the big Ö when expecting the lower case ö.
Gone try some other layouts before editing one.

After reading the wiki i expected this to be a hardware function to work out of the box … silly me ;-)