They might be more expensive than what you’re looking for, but System76 laptops come with Ubuntu, and you can install any distro on them without the BIOS or secureboot locking you out of your own hardware.
Framework laptops also support Linux and they’re the most repairable laptops ever made. If your motherboard died you could replace that and keep everything else. You could keep one of those running for decades by replacing each part that dies; like a ship of Theseus.
Another good suggestion of you end up replacing it. Apparently the framework laptops work well with Linux too but they may cost more than you want to spend. Also, dell has a lot of Ubuntu certified laptops these days.
System76, I'll take a look.
Framework may say they're the most repairable/modular, but fact is it's still just another proprietary system like every other laptop.
System 76 and framework are ungodly expensive. Not something I'm really looking for. But I guess you get what you pay for. I've been noticing on Amazon there's all these renewed laptops. And I've seen some of the same brand that I have. What I think I'd first is I would get a renewed laptop and then run my Linux on a thumb drive just to see how the laptop handled it. Then maybe I could dual boot it for a bit. After a month maybe then I would just wipe the windows OS off. I think wiping it right away and having a hardware problem would just get the person I bought it from to say well you avoided the warranty because you put your own operating system on it. A lot of these new laptops are just built like shit with flimsy touchpads. It is very discouraging trying to use them with said touch pads.
Framework says they are publishing their hardware specs so that other vendors can make parts that fit their chassis. They’re trying to create an open standard for easily replaceable laptop parts.
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