Собственно при попытке добавить принтер в лог ошибок купса валится это:
E [05/Apr/2016:10:24:14 +0400] Unable to open listen socket for address [v1.::1]:631 - Address already in use.
E [05/Apr/2016:10:24:14 +0400] Unable to open listen socket for address 127.0.0.1:631 - Address already in use.
W [05/Apr/2016:10:53:42 +0400] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 'Cups-PDF-Gray..' already exists
W [05/Apr/2016:10:53:42 +0400] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 'Cups-PDF-RGB..' already exists
E [05/Apr/2016:10:53:42 +0400] Unable to open listen socket for address 0.0.0.0:631 - Address already in use.
W [05/Apr/2016:10:54:11 +0400] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 'Cups-PDF-Gray..' already exists
W [05/Apr/2016:10:54:11 +0400] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 'Cups-PDF-RGB..' already exists
E [05/Apr/2016:10:54:11 +0400] Unable to open listen socket for address [v1.::1]:631 - Address already in use.
E [05/Apr/2016:10:54:11 +0400] Unable to open listen socket for address 127.0.0.1:631 - Address already in use.
W [05/Apr/2016:10:57:33 +0400] [CGI] Missing Product in /usr/share/cups/model/Epson-EPL-5700L-epl5700lusb.ppd.gz!
W [05/Apr/2016:10:57:33 +0400] [CGI] Missing Product in /usr/share/cups/model/Epson-EPL-5900L-epl5900l.ppd.gz!
W [05/Apr/2016:10:57:33 +0400] [CGI] Missing Product in /usr/share/cups/model/Epson-EPL-5700L-epl5700lusb-cups.ppd.gz!
W [05/Apr/2016:10:57:33 +0400] [CGI] Missing Product in /usr/share/cups/model/Epson-EPL-5900L-epl5900l-cups.ppd.gz!
W [05/Apr/2016:10:58:06 +0400] [CGI] Missing Product in /usr/share/cups/model/Epson-EPL-5800L-epl5800l-cups.ppd.gz!
W [05/Apr/2016:10:58:06 +0400] [CGI] Missing Product in /usr/share/cups/model/Epson-EPL-5700L-epl5700l-cups.ppd.gz!
W [05/Apr/2016:10:58:06 +0400] [CGI] Missing Product in /usr/share/cups/model/Epson-EPL-5800L-epl5800l.ppd.gz!
W [05/Apr/2016:10:58:06 +0400] [CGI] Missing Product in /usr/share/cups/model/Epson-EPL-5700L-epl5700l.ppd.gz!
И не дает выбрать модель принтера, картинка во вложении.
Лечиться удалением файлов епсона.