On Mon 15 Feb 2021 at 19:36:29 +0100, mh wrote: > Am Mon, 15 Feb 2021 15:12:49 +0000 > schrieb Brian Potkin <claremont...@gmail.com>: > > Only for curiosity: > On systems where there is NO problem, why do I see one printer in cups > config (network printer) resulting in two printers in the printing menu?
Possibly because one is a manual queue and one a cups-browsed queue. https://wiki.debian.org/CUPSDriverlessPrinting#dups Follow our wiki advice or purge cups-browsed. > > This is the concerning part. Why do some commands like ippfind, > > lpstat -e and avahi-browse give empty outputs on Debian unstable? Are > > the Debian and Live ISO versions of ipp-usb the same? > > It is all Debian/unstable. And it does not depend on the version of > ipp-usb ( 0.9.16-1 and 0.9.17-1 ). Both work on live-iso (from > 2021.02, the 2020.07 version didn't ship ipp-usb ) or new installation > (2021.02 dist-upgraded), neither work with my old installation. I know > this for a fact because the problem persist longer than 0.9.17-1 exists. > > I can live without ipp-usb working on this installation. But if someone > tells me how to investigate the flaw, I am happy to investigate, too. I have asked for a little bit of information about lpstat in another post. Maybe the ipp-usb logs Alex requested logs may help. Otherwise, I am at a loss to suggest a good debugging technique. Awaiting inspiration! Brian.