Correct Way to Downgrade 22.1 -> 21.7

[dpeter]

I'm tracking some MCE issues and I want to rule out the culprit being FreeBSD 13.0-STABLE or 13.1-RELEASE (occurs on both).

What is the best way to downgrade from 22.1.x to 21.7.x or to 21.7.8_1 or latest in the 21.7 series that still has the older FreeBSD 12.x kernel.

I mainly want to go back to FreeBSD 12.x or the hardened BSD kernel that shipped with 21.7.x but reverting the packages and userland is fine too, my usage is very minimal just OpenVPN and basic NAT.

Can I use?

Code: [Select]

opnsense-update -kr 21.7
I have read the opnsense-tools man pages and docs but it's not entirely clear to me.

For any reference I'm trying to workaround this error, it may turn out being a hardware issue but I want to try the 12.x FreeBSD kernels first before replacing.

Code: [Select]

MCA: Bank 2, Status 0xb6000000000a010a
MCA: Global Cap 0x0000000000000806, Status 0x0000000000000004
MCA: Vendor "GenuineIntel", ID 0x406c4, APIC ID 4
MCA: CPU 1 UNCOR EN PCC GCACHE L2 ERR error
MCA: Address 0xe50e020
panic: Unrecoverable machine check exception
cpuid = 1
time = 1653803162
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0010c11e40
vpanic() at vpanic+0x17f/frame 0xfffffe0010c11e90
panic() at panic+0x43/frame 0xfffffe0010c11ef0
mca_intr() at mca_intr+0xbb/frame 0xfffffe0010c11f20
mchk_calltrap() at mchk_calltrap+0x8/frame 0xfffffe0010c11f20
--- trap 0x1c, rip = 0x8003eb189, rsp = 0x7fffffffe560, rbp = 0x7fffffffe570 ---
KDB: enter: panic
(older related thread trying to figure out what happened here:  https://forum.opnsense.org/index.php?topic=28422.msg137981#msg137981)

[mimugmail]

No way, you need to install 21.7, restore config and update to latest 21.7