Hello Jothimani

I recently came across this problem and found a solution.

Now, the t-att-selected in your xml option will still fail as auth_signup does not have anything with country-id. I'd just remove the t-att-selected.

You'll have to modify the controller 'main.py' of the module auth_signup. Or inherit it (preferred way)

Then add the following code to the top of the method 'web_auth_signup':

orm_country = request.registry.get('res.country') 
country_ids = orm_country.search(request.cr, SUPERUSER_ID, [], context=request.context) 
countries = orm_country.browse(request.cr, SUPERUSER_ID, country_ids, context=request.context) 
qcontext = self.get_auth_signup_qcontext() # This line is already present in this method. 
qcontext['countries'] = countries 
# Paste the rest of the original method here. 

Hope my explanation was clear

Cheers!