This isn't a "what should I buy" question: I don't care about laptop models or brands. I want to know about hardware capabilities.
Context: I have a disk array that serves videos to various computers in my house over a gigabit line. I'm looking to purchase a laptop to plug into my TV to be a media player. I don't want something like a Roku; I'd like to be able to browse the internet if I need it.
When looking at laptops, what is the lowest-power-consumption, or least-powerful GPU that will play back 1080p videos (complex ones--think scenes from Planet Earth which contain thousands of white birds flying in different patterns against a white backdrop) without hanging? I've been using a PC with 4GB of RAM and an intel 3000 HD series GPU, and it hangs all the time--every time my antivirus updates in the background or something.
What kind/family of GPUs should I investigate? I'd prefer to avoid discrete cards in favor of integrated graphics (saves on laptop cost and power consumption), but if that's what I need, I can deal with it.
I don't need any multitasking capability, and am fine closing out of other apps if it's needed to preserve video playback, but background OS tasks (e.g. aforementioned AV updating and whatnot) should not hang playback. I don't care what OS the laptop runs, either.
Tl;DR: What laptop GPU can play back complex 1080p without hanging due to background OS tasks?