Over the weekend I was given a crap 2in1 notebook. It is 10 years old and even by standards back then had low end hardware (MSRP was 300 Euro according to some googling).
The Atom CPU is 64bits, the UEFI 32bits – a combinaon I completely forgot existed and many distributions no longer support.
Not only does postmarketOS support 32bit UEFI, thanks to its smartphone focus it comes with zram preconfigured. Installation was easy using the graphical installer for generic x86-64.
So now I run a fully featured desktop, KDE Plasma, on it. None of that "lightweight" stuff that sacrifices features and usability for a few megabytes of RAM.
I only tweaked it a little bit. Firefox ran like shit. Chromium was better in that regard but for whatver reason YouTube specifically kept logging me out. Also RAM ran out once and Chromium was force closed by the OS.
I ended up installing KDE’s Falkon browser which offers the benefits of Chromium’s rendering speed without the logging out of YouTube part. It's also a bit less resource intensive, yet comes wih an ad blocker and support for user scripts which relieves the lack of proper extensions.
pmOS doesn't come with swap by default. I added a swap file which is quickly done. It's barely used since switching to Falkon, currently only 100MB.
YouTube video playback at 1080p is smooth. Zero problems with suspend so far.
I'm not sure if it's the result of defective hardware or just driver incompatibilities but Bluetooth is not recognized (bummer) and the camera isn't either (don't care for it).
Long story short:
I rescued a crap PC from the scrap pile. It's now genuinely usable, albeit with the aformentioned caveats.
In essence it's not much different than regular Linux distributions. There are some quirks related to pmOS being a derivative of Alpine Linux. It uses musl instead of glibc, so don't expect meaningful NVidia support. Other than that, it's regular kernel, regular Mesa. (Native package selection is much smaller than anything mainstream, Flatpak works, though.)
I couldn't get a stable WiFi connection using WPA3 Personal. Not sure what the fault is. Switching the connection over to WPA2 in Plasma's Network settings did the trick. This PC's trackpad and touchscreen work absolutely fine but – and I think that's how the hardware is designed and nothing to do with pmOS – the trackpad doesn't show up as trackpad but as a mouse. So I cannot reconfigure it to use two finger scrolling. Scrolling is always on the left edge.
Websites claim that this PC supports bluetooth but the adapter doesn't show. As I wrote in another comment, I suspect a hardware defect, given how abnormally unstable Windows 10 was. I need to get my hands on a USB Bluetooth dongle. I use my headphones via USB in the meantime which physically tethers me to the device but works fine.