Hey!
The ABNT2 layout works great, but my curren USB (external) keyboard is hasn´t ABNT2 layout, it has US layout. I can type with not problems (yet) on the laptop´s keyboard and my USB ABNT2 keyboard, but the known combination of Brazilian Portuguese with US International layouts are not working as used to.
I´m using teh US layout one because is the only 10keyless with brown switches I have and the laptop screen I use as my secondary screen, so it far from me a bit.