[sane-devel] debug file attached (Re: Canon MP710/740 support request)

[Nicolas]

Ok, Allan, thanks for your kind present ;-)

AFAIK, (for MP610 at least), different resolution on x and y axis are
always rejected
by the scanner (tested it already).
The Windows driver (MP610's) always use same x & y, and you cannot
specify different
x/y values, only _one_ value can be entered as dpi parameter in Canon's
driver form.

So the good question now: why does Canon specify resolutions of a x 2a,
if you can
only use a x a ?

If someone's got a clue ...

Le lundi 11 février 2008 à 16:14 -0500, m. allan noah a écrit :

> Gernot- does the windows driver allow independent resolution controls?
> what are you going to do with the stretched image that will result?
> 
> Nicolas- cvs is open for business again, so we can accept your patch
> at any time. keep up this level of interaction and you'll get
> maintainership too :)
> 
> allan
> 
> 2008/2/11 Nicolas <nicolas.martin at freesurf.fr>:
> >
> >  Hi Gernot,
> >
> >  That sounds great news, and we can inform the Sane list then!
> >
> >  I had a look at the debug trace you sent me, and everything looks right,
> > working as expected.
> >  I'll keep it anyway as a reference, if needed.
> >  Let us know if you are able to reproduce the problem you had before, and if
> > you can get such
> >  a trace with the error, please send it, as to investigate more.
> >  One point that could be done to improve the driver is to implement the
> > send_time function, as the
> >  scanner asks for it. Would be needed for that, a Snoop of the usb port with
> > the Windows driver.
> >  But why a scanner would need time? It seems to work fine without it anyway.
> >
> >  For now, I'll update the current stand-alone Pixma driver with Pixma MP710
> > and MP740, as well as
> >  the patch to Sane files, so as to have it included in future Sane releases
> > too.
> >
> >  Thanks again for your participation and help for enhancing the Pixma Sane
> > driver
> >
> >  Regards
> >  Nicolas
> >
> >  Le lundi 11 février 2008 à 09:33 +0900, Gernot Hassenpflug a écrit :
> >  On Feb 11, 2008 3:30 AM, Nicolas <nicolas.martin at freesurf.fr> wrote:
> > >
> > > Ok, great!
> > >
> > > In order to debug the 600 and 1200 dpi, I will need the traces produces by
> > > the driver in debug mode.
> >
> > Dear Nicholas,
> >
> > Your driver is apparently working perfectly for me now, no idea why I
> > got a hardware error last night with all resolutions above 300. I even
> > tried again to use the scan program sending output to the console, and
> > although for 1200dpi it took a *long* time(!), there was no error and
> > the program scanned to completion eventually.
> >
> > I am nevertheless attaching for you the debug output of a successful
> > 1200dpi scan in case there is any content that appears suspicious or
> > dubious.
> >
> > I would also like to ask at this point: is it possible with not too
> > much effort to add independent x and y resolutions, so that 1200x2400,
> > or 2400x4800 etc will be available in the pixma series?
> >
> > Many thanks, Gernot Hassenpflug
> >
> >
> > --
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> > http://lists.alioth.debian.org/mailman/listinfo/sane-devel
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> >
> 
> 
> 
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