[sane-devel] Problems with Canon MP990 transparency unit

Guillaume Courtois guigui at gugux.net
Thu Apr 9 11:45:10 UTC 2015

Le 08/04/2015 11:32, Rolf Bensch a écrit :
> Hi Guillaume,
>> Yes, but the greenish problem (if you refer to that) was really a bug 
>> I
>> believe.
>> One scan from linux and the positive is very greenish.
>> Then one scan from windows and all is ok.
>> Then one scan from linux and all is ok too (same settings of course).
> After a quick investigation, I found that we don't send the tpu info
> (protocol F520) to the scanner, because we don't have some tpu data. I
> attached the Sane (Pixma) and Windows log files to show the difference.
> If you like, you can investigate the Windows driver for the structure 
> of
> the tpu data set for your scanner.


Thanks for the datas. As I'll work on negative scanning, if the greenish 
problem occurs again, I'll try to investigate with them.


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