I have a similar problem. When I unplug my keyboard and monitors from my MBP, my hardware keyboard/trackpad stop working. Sometimes I can get it to work by lock

I have a similar problem. When I unplug my keyboard and monitors from my MBP, my hardware keyboard/trackpad stop working. Sometimes I can get it to work by locking the screen (using bluetooth trackpad) and "switching users" and when on that screen my hardware will start working again. But that's about 50/50. The other half of the time I have to reboot.