Description of problem:
yumex -n

Version-Release number of selected component:
yumex-3.0.13-1.fc19

Additional info:
reporter:       libreport-2.1.9
cmdline:        /usr/bin/python -tt /bin/yumex -n
dso_list:       pygtk2-2.24.0-7.fc19.i686
executable:     /bin/yumex
kernel:         3.11.10-200.fc19.i686.PAE
runlevel:       N 5
type:           Python
uid:            0

Truncated backtrace:
__init__.py:52:_init:RuntimeError: could not open display

Traceback (most recent call last):
  File "/bin/yumex", line 25, in <module>
    from yumexgui import YumexApplication
  File "/usr/lib/python2.7/site-packages/yumexgui/__init__.py", line 27, in <module>
    import gtk
  File "/usr/lib/python2.7/site-packages/gtk-2.0/gtk/__init__.py", line 64, in <module>
    _init()
  File "/usr/lib/python2.7/site-packages/gtk-2.0/gtk/__init__.py", line 52, in _init
    _gtk.init_check()
RuntimeError: could not open display

Local variables in innermost frame:
sys: <module 'sys' (built-in)>
sys_path: ['/usr/bin', '/usr/lib/python27.zip', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-linux2', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/lib/python2.7/site-packages', '/usr/lib/python2.7/site-packages/gtk-2.0', '/usr/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg-info']

Potential duplicate: bug 815902