[Bug 283113] Lenovo Thinkpad T14s Gen4 AMD does not power off on shutdown

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=283113

            Bug ID: 283113
           Summary: Lenovo Thinkpad T14s Gen4 AMD does not power off on
                    shutdown
           Product: Base System
           Version: 14.2-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: quentin.thebault@defenso.fr

Hello,

When issuing a `poweroff` command on this system, it halts, screen display goes
off, but the power button LED is still glowing, and the fan is still running.

There are no error messages on screen before it goes black. Just successfull
closing messages from GELI (encrypted disk setup).

`reboot` seems to be hit-and-miss. Works sometimes but not always.

Workarounds tried, to no avail:
- hw.efi.poweroff=0
- hw.acpi.disable_on_poweroff=0

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