Framework laptops are often mentioned since they chose components that should work well with upstream kernels. So no funny wifi chips or something. Also, as a bonus, easy to take apart and replace parts that you can order separately. https://frame.work/

Tuxedo Computers for sure. KDE also wants to partner with Framework, and Slimbook already makes KDE laptops.

Lenovo, Dell and HP are terrible IMO. Not only are the not Linux focused but also terrible companies. The Linux laptops they make are just to target developers meaning: fix your own software issues 😒 Dell for example has had webcam issues on Linux for ages with their MIPS or whatever cameras and simply don't give two shits.

Support a real Linux laptop vendor like the one mentioned above. Not only do they contribute to Linux and open source in general, but I find they are more accessible in terms of support, and they do pretty well in terms of making Linux work on their hardware.

Anti Commercial-AI license

The latest Slimbook is pretty cool. Plus it has the KDE symbol emblazoned on the lid.

ThinkPad or framework

One channel I follow on YouTube for Linux news "The Linux Experiment" has Tuxedo Computers as a sponsor. They build PCs and Laptops that are optimized for Linux.

Otherwise I'd recommend a Lenovo. I think they're pretty good with Linux if I'm not mistaken.

KFocus

System76 is also a good option especially if you're american. They have a broader option set too

On power management though I'm umsure if you'll get the results you want. It's hell on windows, hell on Linux, and only within the past few years improved on Mac.

You may find better suspend on a laptop made for Linux though but I don't want to get your hopes up too greatly.

Other options for good laptops though are starlabs and tuxedo computers. On tuxedo make sure you get the right language and layout for your country

On framework I can personally vouch for them. I have had great experiences with the 13 and there's a dedicated community happy to help on their forum. Friendly people.

As for slimbook friends of mine who have them have had good experiances too

I cannot recommend Framework laptops enough. I recently got my hands on one and it's the best laptop I've ever owned. It of course runs Linux like a dream. Everything works out of the box. No proprietary blobs needed for any of its hardware drivers, of course, plus the firmware for the embedded controller as well as the keyboard are open source and can be reflashed from the device (the keyboard firmware is even a fork of QMK). Its 165Hz 1440p 16:10 monitor being driven by a Radeon 7700S makes it one of the best laptop gaming experiences I've had, which is especially impressive considering it's not marketed as a gaming laptop. Three hours battery life with the dGPU installed is the best I've seen out of a gaming laptop ever, and if you pull out the GPU and run off integrated graphics, the battery life doubles to a very respectable six hours for web browsing.

There's also of course the obvious customization aspect. Don't like which I/O ports are on the side? Swap in a different module! You don't even have to reboot your computer. Want your trackpad to be centered or off to the side to make room for a numpad? Move it around! You don't even have to reboot your computer. Who needs Nvidia Optimus when you can physically remove the GPU from the laptop, reducing power savings even more and making the laptop several pounds lighter to boot? (You do have to shut down to do that, and swapping it out takes around five minutes, but still.)

I know this post sounds like it was sponsored but it wasn't. I just really love this thing ^-^