I read about this a couple of days ago, apparently some support was there since DOS 2.0.
Take your pick. Though the appeal to nature at the end makes me think it is probably something made up by that particular school.
edit: It isn’t but the appeal to nature is still a fallacy
Not trying to be a menace, but I just tried it out using xdg-portal-test-kde and the screenshot portal definitely works on KDE Plasma 5.27.10. If you are experiencing issues with that, please create a bug report for xdg-desktop-portal-kde so it can be fixed.
I can’t complain, installed Fedora 39 Kinoite and everything is working great. The only thing I have noticed is that drag and drop from dolphin into some flatpak applications is not working; But that is pretty much it and I am not even sure if Wayland is causing this. This is honestly the most usable Linux has ever been for me.
What prevents you from using org.freedesktop.portal.Screenshot with GNOME and KDE as well? They both support taking screenshots using that method.
guess I fucked up my computer beyond repair
Unlikely, only misconfigured. The “Ubuntu success” message might show because your PC tries to boot from a GPT partition on a different disk or you have inadvertently overwritten the Windows bootloader. Booting from a live USB should work but it might take a couple of tries depending on what settings you have changed in the UEFI; also check if your flashdrive is working properly. Apps like the Fedora Media Writer or Rufus can check if the image is not corrupted after writing it to the drive.
Hard to tell from the info you provided. It might be a mixup between legacy MBR and UEFI boot. Try enabling legacy boot in UEFI and make sure the boot order is correct, if your PC is really that old it might just be that your Windows install is still booting from the MBR.