cups browsing protocol unsupported in ubuntu 18.04

**rmstock2** · January 16th, 2019

I installed 18.04 and no doubt is a great improvement over 16.04.
I wanted to print, but cups had failed to automatically add the printers from my old cups server.
lpstat -t comes up empty. cups 2.2.7-1ubuntu2.2 amd64 is installed.
checking the cups error log showed a strange error :

"Unknown browse protocol "cups" ignored." How strange is that ?

https://i.imgur.com/lbJcp0D.png

**rmstock2** · January 16th, 2019

It seems cups printing has since 2016 become an Apple game :

Code:

 SEE ALSO
       backend(7), classes.conf(5), cups(1), cups-files.conf(5),  cups-lpd(8),
       cupsd.conf(5),  cupsd-helper(8),  cupsd-logs(8), filter(7), launchd(8),
       mime.convs(5), mime.types(5), printers.conf(5), systemd(8), CUPS Online
       Help (http://localhost:631/help)


COPYRIGHT
       Copyright © 2007-2017 by Apple Inc.


12 February 2016                     CUPS                             cupsd(8)

**wildmanne39** · January 16th, 2019

That is what my research shows as well, not that it is relevant to your issue.

**rmstock2** · January 16th, 2019

I installed the cups printing engine from 16.04 on bionic 18.04 :

cups : ftp://ftp0.crashrecovery.org/pub/lin...EB/ubuntu1804/
poppler : ftp://ftp0.crashrecovery.org/pub/lin...u1804/poppler/
cups-filters : ftp://ftp0.crashrecovery.org/pub/lin.../cups-filters/

And printing works all right now :

**him610** · January 17th, 2019

It seems cups printing has since 2016 become an Apple game

Possibly, however, those of us who use open source software should also thank Apple.
From https://www.cups.org/
CUPS is the standards-based, open source printing system developed by Apple Inc. for macOS® and other UNIX®-like operating systems.

**rmstock2** · January 18th, 2019

CUPS is the standards-based, open source printing system developed by Apple Inc. for macOS® and other UNIX®-like operating systems.

Not quite :

Code:

SEE ALSO
       backend(1),  classes.conf(5),  cupsd.conf(5), filter(1), mime.convs(5),
       mime.types(5),  printers.conf(5),  CUPS  Implementation  of  IPP,  CUPS
       Interface  Design  Description,  CUPS  Software  Administrators Manual,
       http://localhost:631/documentation.html


COPYRIGHT
       Copyright 1993-2003 by Easy Software Products, All Rights Reserved.


18 July 2002              Common UNIX Printing System                 cupsd(8)

Easy Software Products - Wikipedia

https://en.wikipedia.org/wiki/Easy_Software_Products