I would expect it to work the way Apple devices do in similar situations. Once you hook them up to the charger they begin charging with a charging icon on the screen, and as soon as they have enough power onboard to boot up, they do. No bootloops.
Hey guys, I'm on 05092011-nighty, I tried to reflash couple times, but I still have a problem with the sound effect in setting-sound-feedback. I tick all boxes for audible touch tones, selection, lock sounds, but it just no sounds coming out. Have I miss out something?