I think we have an overzealous "Note" in the Kernel Configuration part of the cups instructions -
| There is a conflict between the Cups libusb backend and the usblp | kernel driver. If you want to use Cups with libusb, do not enable | USB Printer support in your kernel. For several years, I have used the kernel's usblp driver, as a modules. and not libusb. Indeed, I removed colord from my builds when it apparently became dependant on libusb. But while I was testing everything for make-4.0 I had to build libusb, and confirmed that printing via libusb without the kernel's usblp driver worked fine. So far so good, and I decided to reinstate colord and to allow myself to use lsusb from usbutils if I ever needed it. And then I went back to that build to put a 3.13.0 kernel on it. I wanted to check my ink (using escputil), but that needs to read the raw device, /dev/usb/lp0, and I didn't have one. Googling showed that arch's wiki mentions building usblp as a module, inserting it before using escputil, and then rmmod'ing it to enable printing to work. Sounded awkward, but worth a try. In fact, with usblp as a module everything is working fine in 3.13.0 with libusb! When I connect the printer, usblp (and usb_storage - who said printers were straightforward ? :) gets loaded and escputil is able to tell me which ink is running out. And then, even without trying to rmmod usblp, printing through cups works fine. Not sure if building usblp into the kernel will work the same way ? I'll have to try that when I next build a new kernel for this system, I suppose [ CONFIG_USB_PRINTER=y ]. Meanwhile, opinions from people with different usb printers who use cups and libusb would be welcome. Maybe usblp needs to be a module so that it isn't loaded when cups start, or perhaps any previous problem has now been resolved in a recent version of one of the packages. ĸen -- das eine Mal als Tragödie, dieses Mal als Farce -- http://linuxfromscratch.org/mailman/listinfo/blfs-dev FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
