[Qgis-developer] Error : cannot connect to X server on Ubuntu

[devquestions2 at gmail.com]

I am seeing the error "cannot connect to X server" in a stand alone python
application at
"app = QgsApplication([], True)".

As suggested in the mailing archives I tried setting DISPLAY env variable to
"", but that does not resolve the problem. Would be a great help if you can
point me any references on the issue or have any suggestions on what i can
try.

Os Ubuntu

code :

import os
import sys

#qgisprefix = '/usr'
qgisprefix='/usr/share/qgis/resources'


os.environ['DISPLAY']=""
from qgis.core import *

from qgis.gui import *

# configure QGIS paths
QgsApplication.setPrefixPath(qgisprefix, True)

# initalise QGIS
QgsApplication.initQgis()

app = QgsApplication([], True) 

Thanks !



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