Comment 9 for bug 1233944

How did you enable Mir on the current builds? I just flashed --channel devel-proposed on mako (Nexus G4) and it's still using SF.

How do the permissions of "real" input devices compare with the uevent synthesized ones? I expect they are the same (root:android_input 664), then it seems your hunch about Mir dropping "android_input" group privileges at some point is right. In a world of hotplug input devices it must not do that, as input devices can come and go at any time. Even on a phone one might attach an USB or a bluetooth keyboard. It might be interesting to strace the Mir process for calls like setresuid(), setresgid(), setegid() and the like.