Intel GPU: Fastboot can be enabled on >7th GPU generation (so Skylake and beyond), for kernel `5.1`-`6.6`

[ahydronous]

i915.fastboot=1 See: https://wiki.archlinux.org/title/Intel_graphics#Fastboot

Kernel 6.7 removed the option entirely, and from kernel 6.9 it is automatically enabled for all Intel GPUs.