Today’s nightly is already at that hrev, so I think things are OK again now. Sorry about that…
Probably the bootloader changes are to blame, your BIOS may not support one of the wait mechanisms the bootloader now uses. I’ll see about coming up with an alternative.
You were asked on the ticket you opened to upload a syslog from a successful boot, can you do that please? (One with ACPI enabled, ideally.)
I am guessing this is #19973.