[maemo-developers] rx-51 xkb file: how does FOUR_LEVEL type work?

[From: Frantisek Dufka]

Denis DeLaRoca wrote:
> 
> On Mon, 1 Feb 2010, Arkady Glazov wrote:
> 
>> N900 hardware keyboard does not support simultaneous pressing three 
>> keys. You must "lock" function key by double press Fn and after them 
>> shift+ letter

It is not guaranteed but it mostly works. For N810 it produces phantom 
extra key for M and N but otherwise it works fine with any shift+Fn+key. 
Not sure about N900 keys.

> 
> Understood! But notice that for my sample xkb config, to print the "[" 
> char that I slotted at the 4th level
> but it doesn't work.

The trick is to press shift first, not Fn.

Just tried with my N900 and mapped shift+Fn+Backspace to Escape and it 
works. Also tried shift+Fn+qwertyuiop to F1-F10 and at least fullscreen 
and zoom keys (F6,7,8) work.

OTOH I also tried shift+Fn+Enter or Space to do Tab and it doesn't work 
for me with N900. It worked fine with N810.

Frantisek