Re: scanning negatives using HP4850 and genesys backend

Ralph Little <[email protected]> Fri, 31 Jul 2026 09:21:42 -0700
Newsgroups gmane.comp.graphics.scanning.sane.devel
Message-ID <[email protected]> 
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Hi,
According to our Supported Scanners list 
(http://www.sane-project.org/sane-supported-devices.html) the genesys 
backend doesn't yet support the slide scanning feature of this device. 
It requires additional code to drive the extra hardware involved.
We don't have an active maintainer for the genesys backend at the moment 
unfortunately, so I don't know when someone would be able to get to this 
task in the future. :(

Regards,
Ralph

On 2026-07-30 20:58, [email protected] wrote:
>
> |I recently acquired an HP Scanjet 4850 scanner.  The document 
> scanning works with no problems.  This particular scanner has a 
> negative/slide scanning component built in to the lid of the device.  
> This includes a separate lamp to illuminate the film for scanning.  
> The lamp in the lid comes when I run a hardware self test procedure 
> but I have not discovered any way to have the lamp come on when 
> scanning using sane.
>
> Is this capability supported?
>
> info about my setup ---
>
> HP Scanjet 4850
>
> $ scanimage -V
> scanimage (sane-backends) 1.4.0; backend version 1.4.0
>
> genesys backend
>
> Fedora Linux 44 (Workstation Edition)
> Linux 7.1.5-200.fc44.x86_64|
>

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    Hi,<br>
    According to our Supported Scanners list
    (<a class="moz-txt-link-freetext" href="http://www.sane-project.org/sane-supported-devices.html">http://www.sane-project.org/sane-supported-devices.html</a>) the
    genesys backend doesn't yet support the slide scanning feature of
    this device. It requires additional code to drive the extra hardware
    involved.<br>
    We don't have an active maintainer for the genesys backend at the
    moment unfortunately, so I don't know when someone would be able to
    get to this task in the future. :(<br>
    <br>
    Regards,<br>
    Ralph<br>
    <br>
    <div class="moz-cite-prefix">On 2026-07-30 20:58,
      <a class="moz-txt-link-abbreviated" href="mailto:[email protected]">[email protected]</a> wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:[email protected]">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <p><code>I recently acquired an HP Scanjet 4850 scanner.  The
          document scanning works with no problems.  This particular
          scanner has a negative/slide scanning component built in to
          the lid of the device.  This includes a separate lamp to
          illuminate the film for scanning.  The lamp in the lid comes
          when I run a hardware self test procedure but I have not
          discovered any way to have the lamp come on when scanning
          using sane.<br>
          <br>
          Is this capability supported?<br>
          <br>
          info about my setup ---<br>
          <br>
          HP Scanjet 4850<br>
          <br>
          $ scanimage -V<br>
          scanimage (sane-backends) 1.4.0; backend version 1.4.0<br>
          <br>
          genesys backend<br>
          <br>
          Fedora Linux 44 (Workstation Edition)<br>
          Linux 7.1.5-200.fc44.x86_64</code></p>
    </blockquote>
    <br>
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