[Bug 212260] system freezes during boot due to issues with ACPI. (Lenovo B590)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212260

            Bug ID: 212260
           Summary: system freezes during boot due to issues with ACPI.
                    (Lenovo B590)
           Product: Base System
           Version: 11.0-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: peter.kien at fastmail.co.uk
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

I've been trying to boot the FreeBSD 11-RC2 memstick on my Lenovo
B590, but to no avail.

The system freezes during boot, ending with the following message:

---
acpi0: <LENOVO TP-H5> on motherboard
ACPI Error: No handler for Region  [ECOR] (0xfffff80003a33480)
[EmbeddedControl] (20160527/evregion-180)
ACPI Error: Region EmbeddedControl (ID=3) has no handler (20160527/exfldio-320)
ACPI Error: Method parse/execution failed [\_SB.PCI0.LPCB.H_EC._REG] (Node
0xfffff80003a41d40), AE_NOT_EXIST (20160527/psparse-559)
---

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