Re: Re: cups usbfs: process .... (usb) did not claim interface 1 before use
> I'm wondering if it is not related to dis/enabling particular options
> in the kernel - like the usb device id lib or something (I don't
No it rather seems a problem in the cups libusb backend (see the link I
gave for the report upstream). Upstream does not seem inactive on it, so
the best is to have patience. In the meantime, you can download packages
for a working version at http://snapshot.debian.org/ and stick to that
version with apt-preferences (4.6-11+b1 is working fine for me).