On Sun 24 Jan 2021 at 22:46:56 +0000, Chris Bainbridge wrote: > Package: cups > Version: 2.3.3op1-7 > > Cups does not support Canon CAPT USB printers (this requires a proprietary > driver which uses /dev/usb/lp0), but these printers are not blacklisted, so > when one is plugged in, cups sets up a new, non-functional printer, and > probes the USB device, the kernel logs as a USB disconnect, and disrupts > operation of the Canon driver. Running lpstat also seems to do some probe > and cause a USB device disconnect. The kernel logs: > > Jan 23 23:45:29 debian kernel: usblp0: removed > > It appears the fix would be to add CAPT printers to > /usr/share/cups/usb/org.cups.usb-quirks as so: > > # Canon, Inc. LBP3010/LBP3018/LBP3050 Printer > 0x04a9 0x26da blacklist > > etc.
Thank you for your report, Chris. I would be a good idea to report this issue upstream: https://github.com/OpenPrinting/cups/issues Regards, Brian.
