This post is related and in some part a repetition of my other topic on how to buy a laptop for Linux.

Because I'm in Brazil, many brands and stores that do not ship to my country are out of the question, and even the ones that ship usually cost more than I can pay due to currency exchange rate and shipping costs themselves. What are some universal stores, brands and models that I can probably find on my location, that won't give me much trouble running Linux?

I don't require playing games or top performance (8GB RAM and i5 processor would be the minimum requirements). And SSD would be nice, but, for my budget, it's a plus.

I just need something that is durable and works reliably under Linux, especially when it comes to audio and HDMI output, video graphics adapter support, booting from USB, hibernating, sleeping and power management.

Thanks!

Traditionally I've used dark themes for everything I could on all of my devices, as I found it easier on the eyes when I'd usually use my computer (evening - night). Recently, I made the switch back to light stuff as I've been using my computer more for notes and assignments I'd normally hand-write, and I find I get drowsy less and have an easier time using the computer in a bright room than before - I just switched my theme on a whim one morning, so I wasn't expecting that at all!

So now I'm rethinking all my previous bias about dark themes being 'better' regardless of the situation, and I'm curious if anyone here had any thoughts and/or could point me to some reading on the subject (the subject being the effects of light/dark colours in work or concentration). It's something I realize now might be fairly important, as I'm looking at my screen for most of the day, but never really gave much thought before outside of tracking down the 'Dark' theme switch.