I installed Pico-8 on my Raspberry Pi A+ and everything functions properly except the shift key. Holding shift while pressing any other key is not registered.

For example:

KEY COMBO--------OUTPUT

A >>>>> A
Shift+A >>>>> (nothing)

Anyone else having this issue? Is there a solution?

Are you using latest Pico8?

And what region keyboard layout?

I believe it's the latest, but not sure about the keyboard layout. I'm using the method outlined on this site http://guillermoamaral.com/read/picopi/

Which seems to be a bit different than Raspbian/Retropie.

The config.txt file mentions nothing about a keyboard layout. Do you think I should just add a line in there?