@seb128: That's what Richard said in comments. Ideally, even gdm should use hal-system-power-shutdown and all ubuntu/usplash specific things (for shutdown) should be done there in one place.
@seb128: power-shutdown and all ubuntu/usplash specific things (for shutdown) should be done there in one place.
That's what Richard said in comments. Ideally, even gdm should use hal-system-