Since this topic is already debates ati, stream and pyrit, maybe someone could give me a hand:

pyrit list_cores
Pyrit 0.2.3 (C) 2008, 2009 Lukas Lueg pyrit.googlecode*com
This code is distributed under the GNU General Public License v3

The ESSID-blobspace seems to be empty; you should create an ESSID...

Traceback (most recent call last):
  File "/usr/bin/pyrit", line 531, in <module>
  File "/usr/bin/pyrit", line 92, in initFromArgv
    }.setdefault(commands[0] if len(commands) > 0 else 'help', self.print_help)()
  File "/usr/bin/pyrit", line 143, in list_cores
    import cpyrit
  File "/usr/lib/python2.5/site-packages/", line 149, in <module>
    class StreamCore(Core, _cpyrit_stream.StreamDevice):
AttributeError: 'module' object has no attribute 'StreamDevice'
I had installed the ati drivers before reading that I should install ati-backtrack directly. Should that be the origin of my problem?