Bug#982742: cups: config of usb printer now impossible due to usblp and libusb conficting (used to work!)

[mh <m.hatzold@web.de>]

Am Sun, 14 Feb 2021 17:35:47 +0000
schrieb Brian Potkin <claremont102@gmail.com>:

> On Sun 14 Feb 2021 at 17:44:20 +0100, mh wrote:
> 
> > Am Sun, 14 Feb 2021 15:39:51 +0000
> > schrieb Brian Potkin <claremont102@gmail.com>:
> >   
> > > The whole point is that the printer installion is done via
> > > ipp-usb, which you have shown is active on your machine. There is
> > > no need for you to select a PPD or a vendor driver.  
> > 
> > If I could have all features my printer offers available this way,
> > then yes. OTOH the whole problem does not seam to be the protocol
> > used, but cups administration not seeing the printer. 
> > 
> > Is there a way to completly resett systemd/udev/avahi/whatever?
> > Month ago I tried "apt install --reinstall systemd udev" as an
> > attempt to exclude any malfunction.  
> 
> Is avahi-daemon active?
> 
>   systemctl status avahi-daemon

Yes.

# systemctl status avahi-daemon
● avahi-daemon.service - Avahi mDNS/DNS-SD Stack
     Loaded: loaded (/lib/systemd/system/avahi-daemon.service; enabled;
vendor preset: enabled) Active: active (running) since Sun 2021-02-14
14:01:53 CET; 4h 38min ago TriggeredBy: ● avahi-daemon.socket
   Main PID: 711 (avahi-daemon)
     Status: "avahi-daemon 0.8 starting up."
      Tasks: 2 (limit: 4634)
     Memory: 1.7M
        CPU: 402ms
     CGroup: /system.slice/avahi-daemon.service
             ├─711 avahi-daemon: running [neutower.local]
             └─749 avahi-daemon: chroot helper

Feb 14 14:01:51 neutower avahi-daemon[711]: Found user 'avahi' (UID
106) and group 'avahi' (GID 114). Feb 14 14:01:51 neutower
avahi-daemon[711]: Successfully dropped root privileges. Feb 14
14:01:51 neutower avahi-daemon[711]: avahi-daemon 0.8 starting up. Feb
14 14:01:53 neutower avahi-daemon[711]: Successfully called chroot().
Feb 14 14:01:53 neutower avahi-daemon[711]: Successfully dropped
remaining capabilities. Feb 14 14:01:53 neutower avahi-daemon[711]:
Loading service file /services/apt-cacher-ng.service. Feb 14 14:01:53
neutower avahi-daemon[711]: Network interface enumeration completed.
Feb 14 14:01:53 neutower avahi-daemon[711]: Server startup complete.
Host name is neutower.local. Local service cookie is 294> Feb 14
14:01:53 neutower avahi-daemon[711]: Service "apt-cacher-ng proxy on
neutower" (/services/apt-cacher-ng.service) succe> Feb 14 14:01:53
neutower systemd[1]: Started Avahi mDNS/DNS-SD Stack. lines 1-23/23
(END)


> 
> Do you have a firewall?

No.

> 
> Regards,
> 
> Brian.

Greetings

Michael