I'm very keen to get different keyboard mappings with my bluetooth keyboard working.¹ In Maemo, despite all efforts, I'm stuck with it behaving as if it was the internal keyboard, i.e. no numbers but long-pressing q gives 1 etc. Chances are that things are easier with a newer kernel and codebase.

Anyway, two indispensable tools here are evtest and xinput. Both don't pop up in the standard Arch (Arm) packages list but they have very little dependencies to compile them ad hoc.

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¹ Medion P81034 = Perixx PERIBOARD-804i