Am Mon, 15 Feb 2021 15:28:57 +0100 schrieb Till Kamppeter <till.kamppe...@gmail.com>:
Hi Till, thanks for your efforts to help. But to avoid any confusion I summarize the situation: (A) My printer works fine with this computer under the following conditions: Booting a LIVE-ISO (Debain/sid based ISO from siduction.org) or booting an installation based on this LIVE-ISO which then got dist-upgraded. On both installations I can configure and then print either using OKI-B432_010E46_USB (which seams to be the driverless IPP printer) or OKI_DATA_CORP_B432 (which seams to be the printer configured using the vendor PPD file). No problem whatsoever (allthough avahi-utils not installed here). (B) The problem occured in my years old comprehensive installation which I use daily. Here the printer used to work initially (printer bought 2017) until it stopped working about a year ago. Now, with Brians help, we could narrow down the problem to ipp-usb not working correctly. On this installation, removing ipp-usb makes the printer visible and configurable using the vendor PPD file in the cups administration. (BTW, avahi-utils installed here). So my overall conclusion is the following: (A) indicates, there is no HW failure and ipp-usb works fine and reliably with this printer. (B) There is a flaw somewhere within this installation which *affects* ipp-usb without ipp-usb neccessarily being the cause. So if we still dig deeper into this it boils down to searching for whatever flaw prevents ipp-usb to work correctly *on this installation (B)*. I therefor reinstalled ipp-usb here (B). > On 15/02/2021 14:27, mh wrote: > > I then investigated the LIVE-ISO. To my surprise ipp-usb is > > installed within the LIVE-ISO. > > ipp-usb is part of the standard installation in Debian and Ubuntu, to > support printers which do driverless IPP printing. > Standard-conforming printers should work out-of-the-box with that. > > > All the commands which failed/did have an empty > > output on my default system work here with the expected output (I > > guess), except for # avahi-browse -rt _ipp._tcp due to avahi-browse > > not being installed: > > > > # /usr/lib/cups/backend/usb > > DEBUG: Loading USB quirks from "/usr/share/cups/usb". > > DEBUG: Loaded 98 quirks. > > DEBUG: list_devices > > DEBUG: libusb_get_device_list=9 > > DEBUG: Failed to detach "usblp" module from 06bc:0357 > > > > The "usb" backend probably simply encounters your printer's USB > occupied by some process here, not knowing that it is actually > ipp-usb and not the "usblp" kernel module. The method for getting rid > of the kernel module seems no to remove the connection of ipp-usb. > > > # systemctl list-units "ipp-usb*" | grep service > > ipp-usb.service loaded active running Daemon for IPP over USB > > printer support > > > > # lpstat -t > > Zeitplandienst läuft > > Keine systemvoreingestellten Ziele > > Gerät für OKI_DATA_CORP_B432: > > ipp://OKI-B432-010E46%20(USB)._ipp._tcp.local/ > > OKI_DATA_CORP_B432 akzeptiert Anfragen seit Mo 15 Feb 2021 12:45:49 > > CET Drucker OKI_DATA_CORP_B432 ist im Leerlauf. Aktiviert seit Mo > > 15 Feb 2021 12:45:49 CET > > > > # lpstat -l -e > > OKI_B432_010E46_USB_ network none > > ipp://OKI-B432-010E46%20(USB)._ipp._tcp.local/ > > OKI_DATA_CORP_B432 permanent > > ipp://localhost/printers/OKI_DATA_CORP_B432 > > ipp://OKI-B432-010E46%20(USB)._ipp._tcp.local/ > > > > This looks like that a driverless print queue got created > automatically. Could you run these two commands: > > lp -d OKI_B432_010E46_USB_ ~/.bashrc > lp -d OKI_DATA_CORP_B432 ~/.bashrc > > Do you get something printed? If yes, by the first command? By the > second? Both? > > > # avahi-browse -rt _ipp._tcp > > Command 'avahi-browse' not found, but can be installed with: > > apt install avahi-utils > > > > Install this command by actually doing > > sudo apt install avahi-utils > > Then run the command again and post the output here. > > > > > @ till.kamppeter > > As much as I'm willing to help, from what I can tell now I assume > > there is not much to debug *direktly* related to the printer. Tell > > me if you think otherwise. > > > > If the printer is capable of driverless printing via an > auto-generated all is OK. But if it is not capable of that but > pretends to be capable then somewhere is a bug, in our software or in > the printer, in the latter case we caould perhaps work around in our > software. > I am not sure whether it's worth to investigate the (A) situation, as there all is working fine. But as you think DEBUG: Failed to detach "usblp" module from 06bc:0357 points to a problem, I'll do some testing: > lp -d OKI_B432_010E46_USB_ ~/.bashrc > lp -d OKI_DATA_CORP_B432 ~/.bashrc Both commands successfully printed. Note: this is not the installation I have problems with! The same on the problematic installation (B) with ipp-usb reinstalled and rebooted: $ lp -d OKI_B432_010E46_USB_ ~/.bashrc lp: Error - The printer or class does not exist. ~$ lp -d OKI_DATA_CORP_B432 ~/.bashrc Anfrage-ID ist OKI_DATA_CORP_B432-5 (1 Datei(en)) but NO print. And in the cups joblist the same long known error: "Warte darauf dass der Drucker verfügbar wird." Waiting for the printer to become available And the printer's little LCD is showing: Ready to print. And the moment I purge ipp-usb again, the printer starts to print without the job being sent again. > > > > BTW (not related the this malfunction): > > There are already some OKI PPD files available in the cups config, > > including the PPD file for the preceding model. > > What do you mean with this? Is there a PPD for your printer included > in Debian or Ubuntu? Or did you download it directly from Oki? > > > Could I do anything to > > help to include the appropriate vendor PPD file > > for my printer (freely availabe on their webite) in the > > printer-driver-oki package (or whichever package is the rightone)? > > If the PPDs are under a free software license we can add them to > OpenPrinting (and this way to all distributions and also the > PostScript Printer Application). > > Till No PPD on Debian or Ubuntu, and yes, I downloaded directly from OKI: https://www.oki.com/de/printing/support/drivers-and-utilities/?id=46398401FZ01&tab=drivers-and-utilities&productCategory=mono&sku=45762012&os=ab33&lang=ac5 The licence shown on this site is rather restricted. I file a wish-bug as suggested by Brian. Regards Michael
