mythburn.py crashes: AttributeError: 'weakref' object has no attribute 'commit'

[Simon Lambourn]

While archiving a mpg video to DVD, I go through all the steps to define what I want to write to DVD, press the 'next' button, and after a delay, the log view is displayed, but no text, and nothing is happening. When I look in mythburn.log, I find the following error message:

Traceback (most recent call last):
  File "/usr/share/mythtv/mytharchive/scripts/mythburn.py", line 197, in <module>
    DB = MythTV.MythDB()
  File "/usr/lib/python2.7/dist-packages/MythTV/database.py", line 1271, in __init__
    elif self._testconfig(tmpconfig):
  File "/usr/lib/python2.7/dist-packages/MythTV/database.py", line 1301, in _testconfig
    self._schema_name)
  File "/usr/lib/python2.7/dist-packages/MythTV/database.py", line 1324, in _check_schema
    sver = int(cursor.fetchone()[0])
  File "/usr/lib/python2.7/dist-packages/MythTV/_conn_mysqldb.py", line 107, in __exit__
    self.commit()
  File "/usr/lib/python2.7/dist-packages/MythTV/_conn_mysqldb.py", line 98, in commit
    def commit(self): self.connection.commit()
AttributeError: 'weakref' object has no attribute 'commit'

That's the whole content of the file. I have had this working before, but it was several months ago, probably with a different release of mythtv.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: mytharchive 2:0.27.1+fixes.20140624.aa822f5-0ubuntu6 [origin: unknown]
ProcVersionSignature: Ubuntu 4.2.0-21.25-generic 4.2.6
Uname: Linux 4.2.0-21-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CrashDB: mythbuntu
CurrentDesktop: Unity
Date: Wed Dec 16 21:33:31 2015
Installed_mythtv_dbg: 2:0.27.1+fixes.20140624.aa822f5-0ubuntu6
SourcePackage: mythtv
UpgradeStatus: Upgraded to wily on 2015-10-25 (52 days ago)