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p.MsoNormal,p.MsoNoSpacing{margin:0}</style></head><body><div>Due to a hard failure in the boot loader, I had to completely re-install my Fedora 33 system. (My attempts to just re-install the boot loader didn't work.) Everything's once again working (including my printer) *except* for the HP ScanJet Pro 2000 s2 scanner.<br></div><div><br></div><div>'scanimage -L' displays<br></div><blockquote type="cite"><div>device `plustek:libusb:003:005' is a Canon CanoScan N1220U flatbed scanner<br></div><div>device `airscan:e0:HP ScanJet Pro 2000 s2 (USB)' is a eSCL HP ScanJet Pro 2000 s2 (USB) ip=127.0.0.1<br></div><div>device `hpaio:/usb/HP_ScanJet_Pro_2000_s2?serial=CN09EA204V' is a Hewlett-Packard HP_ScanJet_Pro_2000_s2 all-in-one<br></div><div>device `hpaio:/net/scanjet_pro_2000_s2?ip=127.0.0.1&queue=false' is a Hewlett-Packard scanjet_pro_2000_s2 all-in-one<br></div></blockquote><div></div><div><br></div><div>(The Canon N21220U is an oldie-but-goodie that I can access, but isn't my concern. I want to use the ScanJet Pro.)<br></div><div><br></div><div>No matter whether ipp-usb is<br></div><ul><li>installed and running,<br></li><li>installed and not running, or<br></li><li>not installed,<br></li></ul><div>and regardless of which of the three choices above I'm using to access the scanner,<br></div><div>in all cases I get the unhelpful diagnostic message<br></div><blockquote type="cite"><div>Failed to open device `hpaio:/usr/HP_ScanJet_pro_2000_s2?serial=CN09EA204V'<br></div><div>Error during device I/O.<br></div></blockquote><div><br></div><div>I also tried removing the 'hplip' package, but that didn't help either.<br></div><div><br></div><div>Any thoughts on what might be broken? Any debugging I could enable that might shed light? Any further information I could provide to help diagnose?<br></div><div><br></div><div>Thanks for any help you can provide.<br></div><div><br></div><div>Ellis<br></div><div><br></div><div><br></div><div>On Fri, Mar 5, 2021, at 9:33 AM, Ellis Cohen wrote:<br></div><blockquote type="cite" id="qt" style=""><div>Thanks for your help! IPP-over-USB <i>was</i> the culprit (although I have no idea exactly what latest-update from Fedora changed previous behavior).<br></div><div><br></div><div>I determined that for my configuration, it was least-invasive to simply execute<br></div><div><br></div><blockquote type="cite"><div><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;">ipp_usb_was_active=false</span></span><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;"></span></span><br></div><div><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;">sudo systemctl --quiet is-active ipp-usb</span></span><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;"></span></span><br></div><div><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;">if [ $? -eq 0 ] ; then</span></span><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;"></span></span><br></div><div><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;"> ipp_usb_was_active=true</span></span><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;"></span></span><br></div><div><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;"> sudo systemctl stop ipp-usb</span></span><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;"></span></span><br></div><div><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;">fi</span></span><br></div></blockquote><div><br></div><div>before scanning, and<br></div><div><br></div><blockquote type="cite"><div><span class="qt-font" style=""><span class="font" style="font-family:menlo, consolas, monospace, sans-serif;">${ipp_usb_was_active} && sudo systemctl start ipp-usb</span></span><br></div></blockquote><div><br></div><div>afterwards.<br></div><div><br></div><div>Again, thanks muchly!<br></div><div><br></div><div>Ellis<br></div><div><br></div><div><br></div><div>On Thu, Mar 4, 2021, at 9:43 PM, Zdenek Dohnal wrote:<br></div><blockquote type="cite" id="qt-qt" style=""><div><br></div><div>On 3/4/21 7:39 PM, Alexander Pevzner wrote:<br></div><div>><br></div><div>> 2) Remove hplip and scan driverlessly:<br></div><div>><br></div><div>> dnf erase hplip<br></div><div>> dnf install sane-airscan<br></div><div>><br></div><div>Btw, sane-airscan is installed by default if you have sane-backends<br></div><div>installed :) . I changed that later...<br></div><div><br></div><div>-- <br></div><div>Zdenek Dohnal<br></div><div>Software Engineer<br></div><div>Red Hat Czech - Brno TPB-C<br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><b>Attachments:</b><br></div><ul><li>OpenPGP_signature<br></li></ul></blockquote><div><br></div></blockquote><div><br></div></body></html>