ipython_gtk error - no gdk backend found

ipython-error

$ python --colors=Linux --pylab=gtk
WARNING: Couldn't start log: [Errno 2] No such file or directory: u'$HOME/.ipython/ipython_logs/ipython_log.py'Python 2.7.2+ (default, Oct  4 2011, 20:03:08) 
Type "copyright", "credits" or "license" for more information.

IPython 0.12 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.
[TerminalIPythonApp] Error in enabling GUI event loop integration:
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
/usr/local/lib/python2.7/dist-packages/ipython-0.12-py2.7.egg/IPython/core/interactiveshell.pyc in enable_pylab(self, gui, import_all)
   2605         ns = {}
   2606         try:
-> 2607             gui = pylab_activate(ns, gui, import_all, self)
   2608         except KeyError:
   2609             error("Backend %r not supported" % gui)

/usr/local/lib/python2.7/dist-packages/ipython-0.12-py2.7.egg/IPython/core/pylabtools.pyc in pylab_activate(user_ns, gui, import_all, shell)
    328     """
    329     gui, backend = find_gui_and_backend(gui)
--> 330     activate_matplotlib(backend)
    331     import_pylab(user_ns, import_all)
    332     if shell is not None:

/usr/local/lib/python2.7/dist-packages/ipython-0.12-py2.7.egg/IPython/core/pylabtools.pyc in activate_matplotlib(backend)
    221     # This must be imported last in the matplotlib series, after

    222     # backend/interactivity choices have been made

--> 223     import matplotlib.pylab as pylab
    224 
    225     # XXX For now leave this commented out, but depending on discussions with


/usr/local/lib/python2.7/dist-packages/matplotlib-1.1.0-py2.7-linux-i686.egg/matplotlib/pylab.py in <module>()
    262 from numpy.linalg import *
    263 
--> 264 from matplotlib.pyplot import *
    265 
    266 # provide the recommended module abbrevs in the pylab namespace


/usr/local/lib/python2.7/dist-packages/matplotlib-1.1.0-py2.7-linux-i686.egg/matplotlib/pyplot.py in <module>()
     93 
     94 from matplotlib.backends import pylab_setup
---> 95 new_figure_manager, draw_if_interactive, _show = pylab_setup()
     96 
     97 @docstring.copy_dedent(Artist.findobj)

/usr/local/lib/python2.7/dist-packages/matplotlib-1.1.0-py2.7-linux-i686.egg/matplotlib/backends/__init__.pyc in pylab_setup()
     23         backend_name = 'matplotlib.backends.%s'%backend_name.lower()
     24     backend_mod = __import__(backend_name,
---> 25                              globals(),locals(),[backend_name])
     26 
     27     # Things we pull in from all backends


/usr/local/lib/python2.7/dist-packages/matplotlib-1.1.0-py2.7-linux-i686.egg/matplotlib/backends/backend_gtkagg.py in <module>()
      8 from matplotlib.figure import Figure
      9 from matplotlib.backends.backend_agg import FigureCanvasAgg
---> 10 from matplotlib.backends.backend_gtk import gtk, FigureManagerGTK, FigureCanvasGTK,\
     11      show, draw_if_interactive,\
     12      error_msg_gtk, NavigationToolbar, PIXELS_PER_INCH, backend_version, \

/usr/local/lib/python2.7/dist-packages/matplotlib-1.1.0-py2.7-linux-i686.egg/matplotlib/backends/backend_gtk.py in <module>()
     26 from matplotlib.backend_bases import ShowBase
     27 
---> 28 from matplotlib.backends.backend_gdk import RendererGDK, FigureCanvasGDK
     29 from matplotlib.cbook import is_string_like, is_writable_file_like
     30 from matplotlib.colors import colorConverter

/usr/local/lib/python2.7/dist-packages/matplotlib-1.1.0-py2.7-linux-i686.egg/matplotlib/backends/backend_gdk.py in <module>()
     27 from matplotlib.mathtext import MathTextParser
     28 from matplotlib.transforms import Affine2D
---> 29 from matplotlib.backends._backend_gdk import pixbuf_get_pixels_array
     30 
     31 

ImportError: No module named _backend_gdk