I realize I'm in the minority, however.

By not using avahi you are not in minority by far.
And in fact it does not matter. Everyone has individual needs and with free software and a system like Devuan GNU+Linux you can simply choose what runs in your computer and how.

None of the above are things I want, especially the first and third. I realize I'm in the minority, however. This particular library offers printing from personal laptops, something not always offered by libraries. The funny thing is that this library offers apps for printing from Windows and MacOS only, but given how similar avahi and bonjour are, I'm not surprised Devuan is able to communicate with the printers. I'll never understand why printers are added and deleted, when one would assume printers would be added only. The other library I use does not offer Wi-Fi printing, which explains a lot, I think.

From the https://avahi.org

On a GNU+Linux system look for

man avahi-daemon.conf
man avahi-daemon

The avahi configuration should be found under /etc/avahi directory.

It could be that your CUPS print server is picking avahi discovered printers and creates available print queues for you.
You have a couple of options to handle your issue:

• disable or remove avahi-daemon, but then you will also loose other discovered services

• reconfigure CUPS to not pick up any printers discovered by avahi

The CUPS configuration change, should be in the file /etc/cups/cups-browsed.conf

look for and change

BrowseRemoteProtocols dnssd cups 

to

BrowseRemoteProtocols none

Alternatively or additionally you can add the following in the avahi-daemon.conf

use-ipv4=no
use-ipv6=no

but then I am not sure what avahi-daemon will be good at :-)

I uninstalled the avahi daemon, but I won't know if that was a solution until I return to that specific library in a few days.

How does one reconfigure avahi? I searched for a wiki, but I found nothing. There is no man page for avahi.

Soon I'm going to wipe the drive and reinstall Devuan. I'll immediately uninstall avahi-daemon, but retain Bluetooth (even though I don't use it), and bring the laptop back to the problem library to see what happens.

Try reconfiguring avahi or uninstalling the

package or disabling the service..

If removing avahi-daemon wants to remove other things that you know you want, you can disable it with sysv-rc-conf (or update-rc.d if you like commands.)

I looked at uninstalling avahi, but then I discovered that libavahi is something that Audacious, Brasero, Cinnamon, and many other packages depend upon. avahi seems like a mini-systemd.

The notifications continue to arrive, so uninstalling bluez is not the solution. I will look at avahi to see if I can configure it differently. I also will look at the system logs of my Linux Mint system, as maybe it has been doing this all along and I never knew it. This behavior only happens at one library I use.

Someone asked a related question on the avahi mailing list in December, but no one responded.
https://lists.freedesktop.org/archives/ … 02528.html

This exercise made me understand just a little how much work Devuan developers must undertake to remove the insideous systemd (Darn you, Lennart Poettering!) from Debian. I for one appreciate what the community does.

@mmaglis

I thought I made it clear that I was not using Bluetooth and wanted to keep it that way.

What you made clear is that you did not want to use Bluetooth but did not succeed.
That is why I asked how you try to control/switch off your Bluetooth devices among other things.
My main point is that if you do not provide exact details of your setup, you can only expect vague suggestions.

If you want to permanently disable Bluetooth, you either do it by disabling (e.g. in BIOS) or removing the hardware or by removing Bluetooth kernel module, or by removing service packages like bluez and dependencies, or by reconfiguring your user-space utility that tries to control all the above.

Removing the bluez packages might work for you.
I suggest you monitor your system logs for attempts to activate or access the Bluetooth device.

@ToxicExMachina

I removed bluez, which resulted in about five Bluetooth packages being removed. I'll use the laptop for a day or two and see if the notifications stop.

@fsmithred

avahi was developed by Lennart Poettering! Ewwwwwwwwwwwwwwwwwwwwwwwwwwwwww!

I'll see what happens with bluez being uninstalled, but avahi might just have to go too.

I thought I made it clear that I was not using Bluetooth and wanted to keep it that way.

@Head_on_a_Stick

Never owned a printer? You and I live in entirely different worlds.

I had to install sysv-rc-conf, but then I had bash problems. I'll play with it.

# sysv-rc-conf

Disable the "cups" service with:

# sysv-rc-conf cups off

EDIT: typo.

• Basic hardware specification. E.g. laptop model, Bluetooth device models

• Devuan version installed, with install options

• List of running services and how you control your Bluetooth devices

• Any modifications to default configuration of any software