Re: scanning negatives using HP4850 and genesys backend
[email protected] Fri, 31 Jul 2026 12:01:17 -0500
| Newsgroups | gmane.comp.graphics.scanning.sane.devel |
|---|---|
| Message-ID | <[email protected]> |
This is a multi-part message in MIME format. --------------FbFMV0eEqX3YgxAsdxV4ygLc Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Ralph, Thanks for the reply. I looked at the Genesys Datasheet for the chip (GL646USB) that is used in the HP4850. I see the register that appears to control the slide scanning lamp. Is there another backend that has support for a similar feature? Possibly I could use that as a template to better understand how support for this feature might be implemented in the genesys backend. Thanks again, Jon On 7/31/26 11:21 AM, Ralph Little wrote: > 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| >> > --------------FbFMV0eEqX3YgxAsdxV4ygLc Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> <p>Ralph,</p> <p>Thanks for the reply.<br> <br> I looked at the Genesys Datasheet for the chip (GL646USB) that is used in the HP4850. I see the register that appears to control the slide scanning lamp.</p> <p>Is there another backend that has support for a similar feature? Possibly I could use that as a template to better understand how support for this feature might be implemented in the genesys backend.</p> <p>Thanks again,</p> <p>Jon</p> <p><br> </p> <div class="moz-cite-prefix">On 7/31/26 11:21 AM, Ralph Little wrote:<br> </div> <blockquote type="cite" cite="mid:[email protected]"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> Hi,<br> According to our Supported Scanners list (<a class="moz-txt-link-freetext" href="http://www.sane-project.org/sane-supported-devices.html" moz-do-not-send="true">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 moz-txt-link-freetext" href="mailto:[email protected]" moz-do-not-send="true">[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> </blockquote> </body> </html> --------------FbFMV0eEqX3YgxAsdxV4ygLc--