I'm integrating odoo 9 community on ubuntu 16.04. My only problem is the receipt printer.

  Scenario:

 - Odoo modules installed: pos app, esc/pos hardware driver, Hardware proxy.

- Without the  Hardware Proxy/PosBox > Receipt printer checbox unchecked: it prints with normal dialog of the web browser, sending a PS or similar to the printer, and this driver doesn't support this format ( I guess, beacause I does nothing).

- With the Hardware Proxy/PosBox > Receipt printer checbox checked: It does nothing. The top right corner shows 'Printer offline'.

- From the terminal I can print succesfully text files with the command 'lpr <file>'.

Questions:

How can I configure the hardware proxy driver to communicate to a Generic Text only driver in Ubuntu 16.04?