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<H1>Experiences with Scan Dual II and SANE</H1>
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<STRONG>From:</STRONG> Clark Case (<A HREF="mailto:ccase@rocketmail.com?Subject=Re:%20Experiences%20with%20Scan%20Dual%20II%20and%20SANE&In-Reply-To=&lt;20010216220918.27527.qmail@web1608.mail.yahoo.com&gt;"><EM>ccase@rocketmail.com</EM></A>)<BR>
<STRONG>Date:</STRONG> Fri Feb 16 2001 - 14:09:18 PST
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I found a fellow Minolta Dimage Scan Dual II / Linux
<BR>
user, one Jose Paulo Monitinho de Almeida
<BR>
(<A HREF="mailto:moitinho@civil.ist.utl.pt?Subject=Re:%20Experiences%20with%20Scan%20Dual%20II%20and%20SANE&In-Reply-To=&lt;20010216220918.27527.qmail@web1608.mail.yahoo.com&gt;">moitinho@civil.ist.utl.pt</A>) who had had some limited
<BR>
success in getting his scanner to work with SANE, and
<BR>
I've been trying to duplicate his efforts. I thought I
<BR>
would post the results I've gotten so far, and try and
<BR>
get some suggestions on moving forward.
<BR>
<P>I'd seen posted that the Scan Dual II is actually made
<BR>
by Avision, and used SCSI commands sent over the USB
<BR>
bus. The post said it might be possible to use the
<BR>
usb-scsi driver that is being developed and a modified
<BR>
avision backend to drive my scanner. So, I downloaded
<BR>
the 2.4.1 kernel source and the patches posted on the
<BR>
HP 5300C development site
<BR>
(<A HREF="http://www.neatech.nl/oss/HP5300C">http://www.neatech.nl/oss/HP5300C</A>).
<BR>
The patch for the config module config file didn't
<BR>
work cleanly, so I manually edited that file. The make
<BR>
file patched fine. The usb-scsi.c file didn't
<BR>
contain the vendor ID and product ID for my scanner
<BR>
(0x638 and 0x26a,
<BR>
respectively), so I added them. I changed the
<BR>
references to HP in the avision backend patch to
<BR>
Minolta. I compiled and installed the kernel and
<BR>
modules, booted with the new kernel, and compiled the
<BR>
SANE stuff. After turning on the scanner and doing a
<BR>
&quot;modprobe usb-scsi&quot;, I had my scanner in
<BR>
/proc/scsi/scsi. After doing an &quot;export
<BR>
SANE_SG_BUFFERSIZE=32768&quot;, find-scanner was able to
<BR>
see my scanner. I made a link from /dev/sga to
<BR>
/dev/scanner, and, after waiting for the green light
<BR>
to stop blinking on the front of the scanner, ran
<BR>
xscanimage. As this is a film scanner, not a flatbed
<BR>
scanner, I reset the size from A4 dimensions to 1cm x
<BR>
1cm, hit scan, and nothing happened. I had set the
<BR>
SANE_DEBUG_AVISION to 10, so I was able to see some
<BR>
debugging messages. It had apparently sent the scan
<BR>
command, but the scanner didn't do anything.
<BR>
Xscanimage hung up at this point.
<BR>
<P>I also tried scanning an image in Windows, and then
<BR>
booting into Linux, while leaving the scanner on and
<BR>
the film caddy in place. Jose said that that had
<BR>
worked for him, but I didn't get any different
<BR>
results. I've also been experimenting with VueScan. If
<BR>
I just freshly boot into Linux in insert the usb-scsi
<BR>
module, vuescan just hangs when I try to run it. If I
<BR>
do the &quot;scan an image in Windows&quot; trick, vuescan
<BR>
starts, but clicking on the Preview or Scan buttons
<BR>
doesn't do anything. Trying to exit caused the program
<BR>
to hang up, and tons of messages from the usb-scsi
<BR>
driver to get sent to my syslog. This probably happend
<BR>
when I killed xscanimage as well, I just didn't check.
<BR>
Also, when I try to reboot after trying to scan, my
<BR>
system can't disable my usb mouse, and I have to do a
<BR>
hard reboot. Perhaps I should be doing this with a
<BR>
regular mouse?
<BR>
<P>Well, that's where things stand now. If anyone has any
<BR>
suggestions for moving forward, I'd certainly
<BR>
appreciate hearing them. I've already email Ed Hamrick
<BR>
with my experiences in VueScan, to see if he has any
<BR>
ideas there. It would seem that the avision backend
<BR>
was written with flatbed scanners in mind, and
<BR>
probably doesn't have the commands built in for
<BR>
transporting the film caddy, focusing,
<BR>
etc. We will probably need information from Avision or
<BR>
Minolta for doing this stuff. Does anyone have any
<BR>
contacts in these companies that may be able to
<BR>
provide the data we need?
<BR>
<P>Thanks,
<BR>
<P>Clark
<BR>
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