I have some familiarity with Linux, and have used it in the past (Debian, kali, Raspbian).

My end goal is to create a dual-boot (windows 10 + arch), multiseat system (multiple users using arch independently)

Taking small steps, I have managed to install a base arch os to a spare partition

I have installed the base linux kernel, grub as my bootloader, xorg as my display manager

So far, all good

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When installing a desktop environment, things look okay, but upon booting into them, an error is found -

the login screen reacts fine, but after logging in, either a black screen crash (on plasma 11) or a loop back to the login page (on gnome as well as budgie)

I have an Nvidia graphics card (GTX 1660ti), and my search for answers so far seem to point to a potential driver issue. I have installed and reinstalled nvidia, nvidia-utils, and nvidia-settings (as well as some gl libs iirc) to no avail

So, I'm out of ideas; any suggestions? to clarify, the loop to login is caused by executing lightdm while the crash is caused by sddm

xorg logs: https://pastebin.com/2PhvTADN
sddm logs: https://pastebin.com/0Hc5Pdkj

Another note of interest. While installing arch within virtualbox, this same issue was there. I assumed it was a virtualization issue, so I proceeded with the real install. However, it still happens. This potentially points to a system-wide issue, yeah?