[sane-devel] pixma mg7500 testing

Jonathan Anderson emailjonathananderson-new at yahoo.com
Thu Aug 6 12:38:09 UTC 2015

I have tested network connections for Canon Pixma MG7550
Connected by cable to router, it was detected and scanned.scanimage -Ldevice `pixma:MG7500_192.168.1.212' is a CANON Canon PIXMA MG7500 Series multi-function peripheral
However, the scanner was not found by "Simple Scan" so I had to scan from command line.scanimage -x 100 -y 100 --format=tiff >image.tiff

The original was grey / white and the resulting scan was in striped colors. Not sure what to make of that. I did crop this image in GIMP to make the size acceptable for the list but it qualitatively shows the appeared colors.
When using wifi connection to the router, the scanner is not found by scanimage -L or by sane-find-scanner.It is found and scans correctly using Canons own scangearmp2 resulting in a nice greyscale picture true to the original.
Kind regardsJonathan
      From: Rolf Bensch <rolf at bensch-online.de>
 To: Jonathan Anderson <emailjonathananderson-new at yahoo.com> 
Cc: Sane Development <sane-devel at lists.alioth.debian.org> 
 Sent: Wednesday, July 29, 2015 7:25 PM
 Subject: Re: [sane-devel] pixma mg7500 testing
Hi Jonathan,

I just committed the patch Sane's development sources.

Maybe you want to test ethernet or wifi connection (bjnp). Please read
the manpage for details (man sane-pixma). Don't hesitate to ask the
mailing list for help, if you may need some. Sorry, but I cannot help
with bjnp.

Many thanks for your help.


Am 27.07.2015 um 14:32 schrieb Jonathan Anderson:
> Hi,
> that patch made all the stripes go away and 1200 and 2400 dpi scans now
> look great.
> Scanning is very slow but I suppose that comes down to the scan process
> and the usb2 connection and not the software.
> Thank you for helping open source forward :-)
> Just a short question, as you seem alert and working on this project,
> how come there has been no official release since 2013?
> Cheers
> jonathan
> ------------------------------------------------------------------------
> *From:* Rolf Bensch <rolf at bensch-online.de>
> *To:* Jonathan Anderson <emailjonathananderson-new at yahoo.com>
> *Cc:* Sane Development <sane-devel at lists.alioth.debian.org>
> *Sent:* Saturday, July 25, 2015 12:12 PM
> *Subject:* Re: [sane-devel] pixma mg7500 testing
> Hi Jonathan,
> Attached patch should fix the 1200 and 2400 dpi issue. This file patches
> backend/pixma_mp150.c.
> Please copy attached file into the folder backend/ and process from
> inside backend/ this command: patch pixma_mp150.c pixma_mp150.c.patch1
> Then 'cd ..' and 'make && sudo make install'.
> Please report your results again.
> If this patch is working, I'll update Sane's development sources.
> Cheers,
> Rolf
> Am 24.07.2015 um 16:58 schrieb Jonathan Anderson:
>> Hi,
>> I've tested the sane-backends-git20150724 with Fedora 22.
>> The scanner was correctly detected and scanned 600 dpi good as you said.
>> It showed stripes on 1200 and 2400 just as you said.
>> Do you need to see the scans or can I give you any additional info to
>> help you?
>> Kind regards
>> Jonathan
>> ------------------------------------------------------------------------
>> *From:* Rolf Bensch <rolf at bensch-online.de <mailto:rolf at bensch-online.de>>
>> *To:* Jonathan Anderson <emailjonathananderson-new at yahoo.com
> <mailto:emailjonathananderson-new at yahoo.com>>
>> *Cc:* "sane-devel at lists.alioth.debian.org
> <mailto:sane-devel at lists.alioth.debian.org>"
>> <sane-devel at lists.alioth.debian.org
> <mailto:sane-devel at lists.alioth.debian.org>>

>> *Sent:* Friday, July 24, 2015 9:08 AM
>> *Subject:* Re: [sane-devel] pixma mg7500 testing
>> Hi Jonathan,
>> Please install SANE Development (git) Version as described in
>> README.linux (I assume you're using Linux):
>> http://www.sane-project.org/docs.html
> <http://www.sane-project.org/docs.html>.
>> Then your scanner should scan up to 600dpi without any problems.
>> I assume that you'll see stripes on 1200 and 2400 dpi images, then I'll
>> create a patch for your scanner. Please report your results.
>> Many thanks for your help.
>> Cheers,
>> Rolf
>> Am 22.07.2015 um 16:48 schrieb Jonathan Anderson:
>>> I'd be happy to help with the testing of a Canon Pixma MG7550.
>>> Please tell me what to do.
>>> Kind regards
>>> Jonathan

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