Excellent, thanks Damiano! As a quick step you could send the patch over to the 
DL and I’ll adapt it if needed. Or you could create a merge request, which 
would be more elegant though require additional steps.
---
 Ilia Sotnikov

> On Mar 13, 2018, at 21:29, Cesello <cese...@daimonlab.it> wrote:
> 
> Hi Ilia and Jared
> I'm just registered to this ML to propose my patch to this back end
> driver made in the past weekend.
> And I see someone have my same problem :)
> I've used hp5590 scanner with scanbuttond for years. Some week ago I've
> upgraded my system to debian 9 and
> discovered that scanbd does not works anymore with my scanner. I really
> need this functionality so I've made
> modifications to hp5590.c code to export the options .
> Is a first attempt and the backend called by scanbd threads makes
> buttons quite  responsive
> without using a self polling thread.
> I've made a patch file for debian 9  stable version package (yes but the
> real patch is for hp5590.c only)
> If you are interested I can send it (or tell me if I have to release
> into the repo directly I'm new user here :))
> 
> Damiano
> 
>> On 07/03/2018 14:01, hostcc at gmail.com (Ilia Sotnikov) wrote:
>> Hi,
>> backend author here - it shouldn't be too much of effort to expose
>> button status so scanbd can use it. Though haven't gone thru its
>> documentation to understand requirements. As a technical insight -
>> there is hp5590_read_buttons() function in hp5590_cmds.c that reads
>> button status.
>> However, I'll seek for a volunteer to test a change as I don't have
>> access to HW currently.
>> 
>> On Wed, Mar 7, 2018 at 12:40 AM, Wilhelm Meier
>> <wilhelm.wm.meier at googlemail.com> wrote:
>>> Please try the old scanbuttond-backend for this type of scanner - it
>>> should work. The HP sane backend sadly doesn't support the buttons on
>>> this scanner.
>>> 
>>> Am 06.03.2018 um 15:46 schrieb Jared Hedegaard:
>>>>> Main question: does the HP 5590 support button presses or am I just 
>>>>> setting this up incorrectly?
>>>>> 
>>>>> I'm been successful using scanbd with SANE backends to get scanning 
>>>>> working over my network and locally on the host machine, but I can't seem 
>>>>> to get it to recognize button presses, either running scanbd in 
>>>>> foreground or background.
>>>>> 
>>>>> For past testing, it seems that actions defined in scanbd.conf are used 
>>>>> to tie to the backend options? From searching /var/log/syslog, I expected 
>>>>> to track button presses or get some sort of trigger feedback, and I 
>>>>> didn't think I needed an action set up for it.
>>>>> 
>>>>> Any help on this one would be much appreciated. Thanks.
>>>>> 
>>>>> Jared H
>>>>> 
>>>> After a bit more research, it looks like doing this with the SANE backend 
>>>> for HP 5590 is not possible. scanbd is used to tie custom actions to the 
>>>> options available on the scanner. In this case, none of the 10 options 
>>>> seem to return values. They all look to be ones that I designate from some 
>>>> client software.
>>>> 
>>>> scanbd: found active option[1] tl-x (type: 2) for device 
>>>> hp5590:libusb:001:008
>>>> scanbd: found active option[2] tl-y (type: 2) for device 
>>>> hp5590:libusb:001:008
>>>> scanbd: found active option[3] br-x (type: 2) for device 
>>>> hp5590:libusb:001:008
>>>> scanbd: found active option[4] br-y (type: 2) for device 
>>>> hp5590:libusb:001:008
>>>> scanbd: found active option[5] mode (type: 3) for device 
>>>> hp5590:libusb:001:008
>>>> scanbd: found active option[6] source (type: 3) for device 
>>>> hp5590:libusb:001:008
>>>> scanbd: found active option[7] resolution (type: 1) for device 
>>>> hp5590:libusb:001:008 scanbd: found active option[8] extend-lamp-timeout 
>>>> (type: 0) for device hp5590:libusb:001:008
>>>> scanbd: found active option[9] wait-for-button (type: 0) for device 
>>>> hp5590:libusb:001:008
>>>> scanbd: found active option[10] preview (type: 0) for device 
>>>> hp5590:libusb:001:008
>>>> 
>>>> In this case, it looks like I will have to try the old scanbuttond 
>>>> backends for this, or see if there are optional enhancements for the SANE 
>>>> hp5590 backend.
>>>> 
>>>> Jared
>>>> 
>>> 
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>> 
> 
> 
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