On Wed 27 Oct 2021 at 17:51:04 +0200, Florian Dohrmann wrote: > Hi Brian, > > ok, I disconnected and reconnected. Then I used the code. This is what I > got: > > Couldn't open device, some information will be missing > Couldn't open device, some information will be missing > Couldn't open device, some information will be missing > bInterfaceClass 7 Printer > bInterfaceSubClass 1 Printer > bInterfaceProtocol 4 > iInterface 0 > -- > bInterfaceClass 7 Printer > bInterfaceSubClass 1 Printer > bInterfaceProtocol 2 Bidirectional > iInterface 0 > -- > bInterfaceClass 7 Printer > bInterfaceSubClass 1 Printer > bInterfaceProtocol 4 > iInterface 0 > can't get debug descriptor: Resource temporarily unavailable > Couldn't open device, some information will be missing > -- > bInterfaceClass 7 Printer > bInterfaceSubClass 1 Printer > bInterfaceProtocol 4 > iInterface 0
This output is fine. You have an IPP-over-USB device. See the Release Notes for Debian 11. > ● ipp-usb.service - Daemon for IPP over USB printer support > Loaded: loaded (/lib/systemd/system/ipp-usb.service; static) > Active: active (running) since Wed 2021-10-27 17:48:14 CEST; 18s ago > Docs: man:ipp-usb(8) > Main PID: 6135 (ipp-usb) > Tasks: 11 (limit: 9830) > Memory: 7.4M > CPU: 39ms > CGroup: /system.slice/ipp-usb.service > └─6135 /sbin/ipp-usb udev This output is also fine and to be expected. If you unplug from USB, the ipp-usb.service will be shown as "Inactive". You did not give 'ippfind -T 5'. Did you try 'driverless' again? We need the output from it. Install the avahi-utils package and give avahi-browse -rt _ipp._tcp
