[sane-devel] Broken ADF-support in pixma-backend: devs needed

[Jörn-Ingo Weigert]

Thank Ralph, if you can dig into this, that will be really great. I agree,
tour assumptions regarding same hardware base do make sense. I hope, Canon
engineers had the same idea. ;)

Just give me a hint, if you like to have some debug output to compare from
the model I use when you have time.

Kind regards,

Jörn-Ingo Weigert

Am 13.10.2017 20:28 schrieb "Ralph Little" <littlesincanada at yahoo.co.uk>:

> Hi,
> I have also had problems with my Canon MF4770N and Rolf has been kind
> enough to assist in the past although it has become increasingly apparent
> that he is really busy with other things.
>
> It still doesn't work and it is something that I would like to rectify.
>
> I do have the skills to get to the bottom of it, but I also don't have
> much time to devote to it but it is on my TODO list sort out.
> For my scanner, some of the setting combinations don't work very well or
> sometimes put the machine in a hardware failure state resulting in my
> having to power cycle it, most likely the result of a timing issue or an
> illegal combination of options. So there is clearly much work to be done. :(
>
> Having gained experience with that I might be able to help with other
> models. I have a feeling that once one is fixed, a number of other models
> will be pretty much the same. Companies like Canon tend to output lots of
> models that are pretty much the same inside and it wouldn't surprise me to
> discover that solving the problem with one would solve the problem with
> many.
>
> When ADF scanning fails on my multi function then I suspect that sane and
> the scanner are out-of-sync, a situation which is difficult to recover from
> without some kind of reset of the scanner itself. Sane thinks that the
> scanner has reported an error and aborts whereas the scanner is waiting for
> instructions to continue the scan from sane.
>
> I will try to put some time aside to deal with this over the next few days
> but I cannot give any guarantees however.
>
> Cheers,
> Ralph Little
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20171013/5bcc7d28/attachment.html>