Marek, I'm sorry it has taken me a month to reply, life is a little 'different' these days :)
So I have gone back through every email thread I have had about the DR-C225, and do have a set of logs from the windows driver. I will attempt to determine which bit of magic we are missing. It will take me some time, as I am travelling now. If you do not hear from me soon, please feel free to reach out. Also, if you want to study up on rebuilding sane-backends from source in the meantime, we will need it. allan On Fri, Jun 26, 2020 at 4:33 PM Marek <mrupn...@tlen.pl> wrote: > > Dear developers, > I wonder if you could help me with resolving a problem with Canon > DR-C225 II scanner (canon_dr backend). The output scan is all black. In > 2015 there was a thread on the predecessor of this scanner: DR-C225 > (without 'II'), which suffered from similar problem. Unfortunately that > thread seems to be prematurely abandoned without solving the issue. > I'm attaching a scanimage log for a page scanned in a grayscale mode (for > the color mode the output scan is black as well). > Best regards, > Marek -- "well, I stand up next to a mountain- and I chop it down with the edge of my hand"