Hi,<br><br>I'm in a tricky situation -- at work I have a Opteron workstation <br>running the antiquated RHEL3 os with no opportunity by me to upgrade<br>anything except by installing newer versions of software in my user<br>
prefix (I can gain root access to tweak hotplug scripts, etc, but<br>shouldn't upgrade system packages). I've installed libusb-0.1.12,<br>sane-backends-1.0.19 and sane-frontends-1.0.14 in my user prefix.<br><br>I'm trying to get a Canon LiDe25 scanner working here (it works fine at<br>
home with my newer machines).<br><br>This is the tail of the error I get from scanimage -L:<br><br>[sanei_usb] sanei_usb_open: opened usb device `libusb:001:017' (*dn=0)<br>[sanei_usb] sanei_usb_get_vendor_product: device 0: vendorID: 0x04a9, productID: 0x2220<br>
[sanei_usb] sanei_usb_write_bulk: trying to write 4 bytes<br>[sanei_usb] 0000: 01 69 00 01 .i..............<br>USB error: error submitting URB: Invalid argument<br>[sanei_usb] sanei_usb_write_bulk: write failed: Invalid argument<br>
[sanei_usb] sanei_usb_close: closing device 0<br><br>And here's an ominous /var/log/messages entry:<br><br>Feb 20 10:22:26 myhost kernel: ioctl32(scanimage:17106): Unknown cmd fd(3) cmd(<br>802c550a){00} arg(ffff50f0) on /proc/bus/usb/001/017<br>
<br>I've had hotplug USB errors on this box before when too many things were plugged<br>in (order of hotplug is important). So I'm using a powered USB hub to power the scanner<br>but the results haven't changed.<br>
<br>The scanner is on 1/17:<br>$ lsusb<br>Bus 001 Device 017: ID 04a9:2220 Canon, Inc. <br><br>Any pointers on what these messages mean?<br>
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