[ltp] Hacking the UltraNav USB keyboard

[Simon Williams]

Richard Neill wrote:
> I asked a while ago whether anyone had had any luck making the external 
> USB Ultranav Keyboard work with Linux. (It's OK, except that the 
> trackpoint sensitivity cannot be turned up to 100%, remaining at the 
> default of 30%. This requirement of a forceful press is what I want to 
> fix.) I had another go at it today; here's what I found:
> 
> Unfortunately, Windows doesn't seem to send any packets at all at that 
> point! That is rather odd, since the sensitivity of the trackpoint was 
> definitely changing when I moved the slider.
> 
> 6)This means either:
>    - I'm looking at the wrong thing
>    - The sniffer can't capture certain control packets
>    - There's a bug in SnoopyPro
>    - There isn't a sensitivity register in the hardware itself, but it's
>        all done in software.
> 
> 
> Does anyone have any thoughts?

I think most USB devices are still PS/2 compliant, because you can just 
stick a USB-PS/2 adapter on them and they will work. I don't think there 
is anything in PS/2 which will let you specify things like sensitivity 
so I would have thought it would all be done in software.

Besides- there isn't really any point in doing it in hardware- why make 
extra work for yourself? All you'd be doing is scaling the output, which 
might as well be done in software.