Comment 5 for bug 217504

Interestingly enough, when I manually define the keycode using setkeycodes (in my case, the IBM button is e017 on a T40p) the key magically works.
However, it seems that it's dependent on each other. The key isn't recognized until both the kernel has it defined, and the key is triggered through an acpi_fakekey.
I find that odd, since it should at least work if it's defined at the kernel level.

Also, this implies the change does not persist through reboot.