[Pkg-cups-devel] Bug#560003:

[James]

Please review the patches described for Ubuntu Oneiric from Till Kamppeter, till at linuxprinting.org :

 https://bugs.launchpad.net/ubuntu/+source/cups/+bug/564917

 Ubuntu 10.04 does not recognize local printer connected via USB/parallel adapter cable


	Till Kamppeter (till-kamppeter) wrote on 2011-11-10: 	#66

	Can everyone who has still problems with printing from his USB printer
	after booting the new kernel try the new CUPS package in my PPA
	(https://launchpad.net/~till-kamppeter/+archive/ppa)? Simply follow
	the instructions under "Adding this PPA to your system" and then
	update your Oneiric system.



I have Debian Sid, linux-image-3.1.0-1-686-pae version 3.1.1-1 on a ThinkPad T60, and
cups version 1.5.0-12:

 $ lsusb
 Bus 002 Device 002: ID 067b:2305 Prolific Technology, Inc. PL2305 Parallel Port

connected to an HP Laserjet 4 Plus. There is no "/dev/usb" until

 $ sudo modprobe usblp

 $ dmesg
 [39268.349834] usblp0: USB Bidirectional printer dev 2 if 0 alt 1 proto 2 vid 0x067B pid 0x2305
 [39268.349863] usbcore: registered new interface driver usblp

 $ ll /dev/usb/lp0 
 crw-rw---T 1 root lp 180, 0 Nov 20 21:01 /dev/usb/lp0

 $ sudo /usr/lib/cups/backend/usb
 DEBUG: list_devices
 DEBUG: usb_find_busses=5
 DEBUG: usb_find_devices=8

from package printer-driver-foo2zjs, version 20111023dfsg0-1

 $ sudo usb_printerid /dev/usb/lp0 2>&1 | cat -v -
 GET_DEVICE_ID string:
 <there follows a lot of binary, or nothing, but not text, which changes each
 time the command is run>

 $ hp-probe -busb

 HP Linux Imaging and Printing System (ver. 3.11.10)
 Printer Discovery Utility ver. 4.1
 ...
 warning: No devices found on the 'usb' bus. ...



James