[Bug 211895] 11.0-RC1: Exception: AE_ERROR, Thread ... could not acquire Mutex

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211895

            Bug ID: 211895
           Summary: 11.0-RC1: Exception: AE_ERROR, Thread ... could not
                    acquire Mutex
           Product: Base System
           Version: 11.0-RC1
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: afiskon at devzen.ru
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

Functionality mentioned below worked flawlessly in 11.0-BETA4 but was broken in
11.0-RC1.

I have Logitech USB mouse and keyboard. When I hibernate a system for a long
time (a few hours) after resume these devices don't work. Reconnecting doesn't
help. When I execute 'sudo usbconfig' it hangs for a few minutes before
printing anything.

Here are truss output (hanging start is marked by two empty lines) and
/var/log/messages:

http://afiskon.ru/s/ed/ab93d78930_logitech-bug.txt

Shutting a system down after this shows such an error:

http://afiskon.ru/s/22/8c7d9a480f_freebsd110rc1bug.jpg

(As a side note it could be two separate issues.)

This problem reproduces every day so I would be happy to provide any additional
debug information you might need.

Could be related to https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202551

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