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Problem
After upgrading your server to use rvm and Ruby 1.9 you get the following error when you are trying to access certain parts of your redmine installation:

passenger ArgumentError (invalid byte sequence in US-ASCII)

Solution
If you follow the instruction posted here, you can add the following to your redmine’s “RAILS_ROOT/config/initializers/string_encodings.rb”:

Encoding.default_external = 'UTF-8'

and restart your application

Problem
You would like to (re)-install passenger after a system wide rvm installation, but you only have the mod_passenger.c file and not the .so after the gem installation.

Solution
Make sure that after using gem install passenger you also use the command to install the apache2 passenger module:

passenger-install-apache2-module

you should then be able to see the .so file and add it to your /etc/apache2/mods-available/passenger.load

Problem
You want to deploy your rails application using Passenger in Dreamhost, but on a staging environment. It doesn’t work just changing your Capistrano recipe or your environment files, as the default environment for passenger is ‘production’.

Solution
Looking at the Passenger documentation here, there are four different ways of achieving that by changing the RailsEnv option. If you don’t want to change the Apache configuration files, and as long as the option AllowOverride is on (which should be on Dreamhost), then you would need to create an .htaccess file in your application’s public folder with the following:

RailsEnv staging