[Bug 250248] 12.2-RC2 kernel reboots with hw.acpi.debug=1 after a warm reboot.

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250248

            Bug ID: 250248
           Summary: 12.2-RC2 kernel reboots with hw.acpi.debug=1 after a
                    warm reboot.
           Product: Base System
           Version: Unspecified
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: rajeev_v_pillai at yahoo.com

FreeBSD 12.2-RC2 reboots after printing a panic message when booted with
hw.acpi.verbose=1 following a warm reboot.

HW: Asus X202E laptop.

Possibly related bug: #249952

Steps to reproduce:

1. Boot FreeBSD 12.2-RC2 with hw.acpi.verbose=1 set in loader.

2. At user login prompt, invoke a warm reboot with CTRL-ALT-DEL.

3. Boot 12.2-RC2 again with hw.acpi.verbose=1.

Kernel will flash an error message (after battery initialization is done),
and what looks like a backtrace, then reboot. If you power the laptop off
instead using CTRL-ALT-DEL, then there is no problem.

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