I was able to install amd64-fydeos_iris on a Thinkpad Carbon X1 Gen 8, but when I try to install amd64-fydeos on a Thinkpad Carbon X1 Gen 4 (5th gen Intel cpu) upon boot, the screen is like all washed out, and there is a message from “chromebox” (appears to be some text-to-speech generator). I’m not doing anything, it happens automatically.
As far as I know both Thinkpad’s are using standard Intel graphics.