[sane-devel] genesys_gl847 scanners produce a black band in scanned images (github issue #7)

[Olaf Meeuwissen]

Hi Fermulator,

Fermulator writes:

> Good day experts
>
> Looking to address sane-backend dev with expertise in the genesys code
> area.
>
> As per:
>  * https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1731459
>  * https://gitlab.com/sane-project/backends/issues/7
>
> I'd like to raise attention to this bug - it has hit countless users
> of the Canon IDE scanner beds;
>
> What we know:
>  * downgrading to 1.0.25 fixes the issue
>  * I believe I isolated the delivery/change to : https://gitlab.com/sane-project/backends/commit/bd0b0cd218504868f32962a5558449956c8ce242
>
> However, there is insufficient context/comments in that commit for me
> to understand if we can just revert that change or not. (i.e. was it
> delivered as an optimization? or to fix some other suite of hardware?
> ...)
>
> Looking for guidance.

No expertise with the genesys backend, but push a branch with a
potential fix, followed up on the issue (#7) and submitted a merge
request (!34).  Waiting for test results as you have probably already
noticed from the GitLab notification(s).

BTW, the merge request is at

  https://gitlab.com/sane-project/backends/merge_requests/34

Hope this helps
--
Olaf Meeuwissen, LPIC-2            FSF Associate Member since 2004-01-27
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