[Bug 243249] FreeBSD 12.1 ThinkPad X201 20 second delay during resume

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243249

            Bug ID: 243249
           Summary: FreeBSD 12.1 ThinkPad X201 20 second delay during
                    resume
           Product: Base System
           Version: 12.1-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: jwb at freebsd.org

A nuisance issue that appeared in 12.0 and continues in 12.1.

Suspend/resume basically works fine, but the system hangs for 20 seconds
between 

iwn0: iwn_read_firmware: ucode rev=0x09dd0401

and

uhub0: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus0

Running 11.x, resume was very quick.

I'm not too concerned about it, but maybe investigating this issue will uncover
solutions for more serious problems.  One more data point...

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