- Nvidia driver (not me, I’m poor)
- dubious/niche AUR packages
- Wrong settings on BIOS/UEFI
- Windows Update on dual-boot setup (sometimes)
I don’t know why, but my archlinux bootloader always disappear if I connet bootable disk when my computer is booting, lol…
Some custom or git version of application. Once a time I need to use sddm git to fix bug with my hylrland.