Unknown filesystem type ext4

Weirdly enough I have the same exact issue in 2025, but only with my 6.12.25-1-lts kernel. It’s own fallback works perfectly, and my none lts kernel 6.14.4-arch1-2 and its fallback has no issues at all.

Try booting off the fallback and running sudo dracut-rebuild

As a side note, please create your own posts for troubleshooting. Posting on a post from 2 years ago where the same error was present is confusing and, in most cases, the root cause is different.

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