Sorry to post so late. Really hope this helps people out. Surprised Hp didn't figure this out and offer a soloutiton.
I was plagued by having my stream 7 plugged in and turned on but it wouldn't charge unless turned off.
Ive been all over the internet, tried everything from new wall jacks with higher voltages and amps, to shorter cords, to factory resets, to uninstalling ACPI battery management and reinstalling to no avail.
Well through vigorous tests and trial and error settings I've found the simplest soloution in the world that should fix this issue for everyone. And when you realize how simple this fix is you'll be astonished, not tricks no gimmics I found the real Free soloution.
Swipe your screen from right to left.,, Click settings, now click screen. Turn your screen brightness down gradually till you get a plugged in and charging notification on your battery icon. I had to drop my brightness to just under half, Now I can charge while using my stream 7.
Your welcome HP for find the easiest soloution for you.
Hope this solves everyones plugged in not charging issues...