UHID Device Reports Do Not Generate OS Activity

Hello,

I am trying to simulate a keyboard using the uhid interface. The fake
device shows up in dmesg, but attempting to press the "a" key does
nothing I can see. No input appears in the active terminal, nor in an
xev window.

The program receives UHID_OPEN, UHID_START, and UHID_CLOSE.

Many different report descriptors were tried. The one currently
uncommented is the one distributed with the USB implementor forum's
HID report descriptor tool. The other is one found in a description of
a boot device compatible keyboard.

Thanks in advance,
     R0b0t1