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Description of problem:

With NetworkManager managing the RFCOMM device during their lifetime, ModemManager picks up a disconnected RFCOMM TTY and does not release it when it disappears.

This is likely a regression with Bluez 5 rebase (part of GNOME rebase for 7.2).

Additional info:

These three likely fix the issue:

http://cgit.freedesktop.org/ModemManager/ModemManager/commit/?id=b8cd5ae838b1a17ce1bb6f01e6491c7b887e8474
http://cgit.freedesktop.org/ModemManager/ModemManager/commit/?id=f79ec9bf4d94a6ae204e24647bf844d6af2ecb96
http://cgit.freedesktop.org/ModemManager/ModemManager/commit/?id=d44690489b57969bfdc44ebfcbfefce6cf3c5b42

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2015-2315.html