Updated instructions for Trusty / 14.04 in addition to comment #18:
1. Download http://epsonepl.cvs.sourceforge.net/viewvc/epsonepl/epsoneplijs/?view=tar
2-6. as in comment #18 above
7. Restart CUPS (I missed 'service' in #18)
sudo service cups restart
---
My 5900L works in 14.04 after that.
Updated instructions for Trusty / 14.04 in addition to comment #18:
1. Download http:// epsonepl. cvs.sourceforge .net/viewvc/ epsonepl/ epsoneplijs/ ?view=tar
2-6. as in comment #18 above
7. Restart CUPS (I missed 'service' in #18)
sudo service cups restart
---
My 5900L works in 14.04 after that.