I will try that when i get home. Are you familiar with the simple control ios app based remote system? Do you have the IR version of the shield?
I was able to use an old mce remote and program the keys to the flirc and then use the old mce remote to control the shield via IR, i dunno about power, i couldn't figure that one out.So heres what i did, in simple control i added the nvidia shield via the simple blaster and used the test remote to learn the ir from the simple blaster into the flirc to control the shield but when i plugged it into the sheild when i was done it didnt respond to any of the simple control commands for the shield remote. So worked for MCE remote, did not for simple control remote.
I will try loading your configuration and seeing if that makes a difference.