Comment # 2 on bug 1207735 from Franck Bui

Since your problem is now solved somehow with 252.5-1.2, I would suggest to
close this bug.

If this will reappear again, please enable systemd debug logs (append
"systemd.log_level=debug" to the kernel command line) and let the boot process
freeze. Then reboot in rescue mode (if that's possible) and try to see if you
can find something in the logs of the previous boot (with `journalctl -b -1`).