The “jp” is a reference to who built it — the Japanese FreeBSD project. I tried a few simple fixes, like booting without ACPI enabled via the boot menu. I burned the normal installation CD-ROM for 5-CURRENT and found it would boot on my Dell. I then installed it as the result:Don’t be worried about the “jp”, this isn’t some sort of Japanese distro. This is a troubleshooting mechanism I can rebuild the kernel without it, as it was built in GENERIC:”]
Source: https://taosecurity.blogspot.com/2004/06/adventures-with-freebsd-current-i.html