Bug#980973: Cups attempts to probe, configure unsupported Canon USB printers
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.
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