[Bug 276011] Lenovo P15v Gen3 (AMD) - FreeBSD14-RELEASE will not boot for installation

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276011

--- Comment #8 from Phil Vuchetich <phil.vuchetich@gmail.com> ---
Created attachment 247682
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=247682&action=edit
ddb trace after using unset hint.uart.1.at

Retesting on FreeBSD-15.0-CURRENT-amd64-20240111-a61d2c7fbd3c-267507-disc1.iso
Verbose boot, single user, boot loader "unset hint.uart.1.at", "boot"        
This gets to a single user shell.
Note: internal keyboard and touchpad do not work. External USB keyboard works.
(partial success as before).

Then: <CTRL>-<ALT>-<ESC> from external keyboard
db> tr
screenshot output attached (9 lines)

Notes on additional unsuccessful tests:
1. I tried "boot -d" to immediately get to ddb, which gets to the DDB prompt,
but neither internal nor external keyboard works (it might just be they are not
initialized).
2. Without using the "unset hint.uart.1.at", the system freezes in the same way
as before prior to getting to a shell.

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