How can I use a CanoScan N640Pex scanner over a USB/parallel cable?

Posted by detly on Ask Ubuntu See other posts from Ask Ubuntu or by detly
Published on 2012-09-09T15:46:19Z Indexed on 2012/09/09 15:49 UTC
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scanner

I have an old CanoScan N640Pex flat bed scanner and a USB-to-parallel port cable through which I can connect it to my PC. Unfortunately neither Simple Scan nor XSane detect the scanner.

I'm running Ubuntu 12.04 (plus updates and backports) with kernel 3.2.0-31-generic.

dmesg tells me this when I plus the cable in:

[256411.641910] usb 7-1: new full-speed USB device number 10 using uhci_hcd
[256411.872392] usblp0: USB Bidirectional printer dev 10 if 0 alt 1 proto 2 vid 0x067B pid 0x2305
[256411.872417] usbcore: registered new interface driver usblp

lsusb shows this device for my cable:

Bus 007 Device 010: ID 067b:2305 Prolific Technology, Inc. PL2305 Parallel Port

The device node created is /dev/usb/lp0

crw-rw---- 1 root lp 180, 0 Sep  9 17:46 /dev/usb/lp0

There is no extra information from any of these commands when I attach the scanner to the cable and power it on, though.

I suspect I might need to change something in /etc/sane.d/canon_pp.conf, but I have no idea what to put for the ieee1284 line, since there is pretty much zero documentation for that parameter.

So how can I get it to work?

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