I made a copy of test_multiprocessing.py (to test_mp.py) and basically
removed all test classes, except _TestCondition. In it, I commented all
test methods except test_notify_all. When run with make test
TESTOPTS="-v test_mp" there's the lockups every few runs, but I also got
(only three times in 40 or so runs so far):


9:57|paul@tabu:~/c/py3k-svn> make test TESTOPTS="-v test_mp"

Failed to find the necessary bits to build these modules:
_gestalt
To find the necessary bits, look in setup.py in detect_modules() for the
module's name.

find ./Lib -name '*.py[co]' -print | xargs rm -f
./python -E -bb ./Lib/test/regrtest.py -v test_mp
test_mp
test_notify_all (test.test_mp.WithProcessesTestCondition) ... ok
test_notify_all (test.test_mp.WithThreadsTestCondition) ... ok
test_notify_all (test.test_mp.WithManagerTestCondition) ... ok

----------------------------------------------------------------------
Ran 3 tests in 1.087s

OK
1 test OK.
CAUTION:  stdout isn't compared in verbose mode:
a test that passes in verbose mode may fail without it.
./python -E -bb ./Lib/test/regrtest.py -v test_mp
test_mp
test_notify_all (test.test_mp.WithProcessesTestCondition) ... ok
test_notify_all (test.test_mp.WithThreadsTestCondition) ... ok
test_notify_all (test.test_mp.WithManagerTestCondition) ... Exception in
thread Thread-28:
Traceback (most recent call last):
  File "/home/paul/c/py3k-svn/Lib/threading.py", line 492, in
_bootstrap_inner
    self.run()
  File "/home/paul/c/py3k-svn/Lib/threading.py", line 447, in run
    self._target(*self._args, **self._kwargs)
  File "/home/paul/c/py3k-svn/Lib/test/test_mp.py", line 208, in f
    cond.wait(timeout)
  File "/home/paul/c/py3k-svn/Lib/multiprocessing/managers.py", line
973, in wait
    return self._callmethod('wait', (timeout,))
  File "/home/paul/c/py3k-svn/Lib/multiprocessing/managers.py", line
748, in _callmethod
    raise convert_to_error(kind, result)
RuntimeError: cannot wait on un-aquired lock