kernel: i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun

*sigh*

gotta figure out if this is a regression is #LinuxLibre specific, or if it's in the plain #Linux kernel. Introduced some time between 6.18.3 and 7.0.10. Symptom is that TTYs go black; Starting Xorg fixes them, then TTYs work again.