This bug was fixed in the package cups-browsed - 2.0.0-0ubuntu3
---------------
cups-browsed (2.0.0-0ubuntu3) noble; urgency=medium
* Added dependencies on pkgconf and cups >= 2.4.6-0ubuntu3 to
to the cups-browsed-tests binary package, to make the autopkgtest
work (LP: #2028172).
-- Till Kamppeter <[email protected]> Tue, 16 jan 2024 12:16:33
-0300
** Changed in: cups-browsed (Ubuntu)
Status: Fix Committed => Fix Released
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to cups-browsed in Ubuntu.
https://bugs.launchpad.net/bugs/2028172
Title:
Cups-browsed cannot bind to port 631 as non-root user on Ubuntu 23.04
Status in cups-browsed package in Ubuntu:
Fix Released
Bug description:
After upgrading to Ubuntu 23.04, my laptop failed to discover our print
server.
The problem seems to have been caused by a new change in cups-browsed that
was added to Ubuntu 23.04.
I looked into it and found a small fix that seems to solve my issue.
Using the debug configuration for cupsd and cups-browsed, I looked through
the logs and noticed the following line:
failed to bind CUPS Browsing socket: Permission denied
After reading more about printer advertisement and cups-browsed, I concluded
that the printer is shared to my Ubuntu 23.04 laptop via CUPS on port 631.
When I connected an Ubuntu 22.04 laptop to the WIFI network, I saw the
printer really was being shared with CUPS on port 631.
Cups-browsed was running as root on 22.04 while on 23.04 it is running as a
new user - cups-browsed, but this new user didn't seem to have the necessary
permissions to open a listening socket on port 631.
The solution I tried was granting the relevant binding permissions to the
binary with this command (on the 23.04):
setcap cap_net_bind_service+ep /usr/sbin/cups-browsed
After giving the permissions, my computer successfully discovered the
printer, just like it used to on 22.04!
I think the command should be added to the post install script or maybe the
capability should be granted to the new cups-browsed user.
I posted it as an issue in the CUPS project on github. They told me to post
it here because its an Ubuntu issue:
https://github.com/OpenPrinting/cups-browsed/issues/17
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/cups-browsed/+bug/2028172/+subscriptions
--
Mailing list: https://launchpad.net/~desktop-packages
Post to : [email protected]
Unsubscribe : https://launchpad.net/~desktop-packages
More help : https://help.launchpad.net/ListHelp
