Re: No progress event during the scan process when using the sane-airscan backend

[Fabien Bodard <gambas.fr@xxxxxxxxx>]

Ok I'm not using airscan..

I need to try this tool to see what is the output and where it is sender
(standard or error output)

Fabien Bodard

Le mar. 27 mai 2025 à 15:48, Claus Dietrich <claus.dietrich@xxxxxxxxxx> a
écrit :

> My Gambas scanner app used to work without issues since years:
>
> https://www.gambas-club.de/viewtopic.php?t=5954
>
> Since I upgraded to Mint 22 I have the problem, that the scan progress
> is not displayed any longer.
>
> As I found out, Mint 22 is now using the sane-airscan backend
> additionally to the sane-utils backend. As a result my app now lists two
> scanner devices although only one is connected and the
> sane-airscan-option was selected as default. It is OK for me to have the
> choice between two scan-devices (resp. backends) now and the
> sane-airscan backend also provides a perfect scan. But when it is
> selected my app doesn't displays the scan progress in its progress-bar
> any longer.
>
> It turned out the "progress" event of the scanner class is not fired
> during the scan progress when using the sane-airscan backend. Instead it
> seems that the events are "collected" and in order to catch up it fires
> all "collected" progress events at the end of the scan process in a
> single batch and within a very short time.
>
> As far as I remember the progress event also used to fire during the
> scan process, when using the sane-airscan backend. Do we possibly have a
> new bug?
>
> When I select the scanner device working with the sane-utils backend
> everything is still fine.
>
> Please be aware that my app uses the scanner class as source code with a
> number of modifications, but non of them are relating to events.
>
> Best regards, Claus
>
>
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