SUMMARY Cannot resume multi-page scan after scanner reconnect. We had a power outage for 2-3 seconds after I scanned a few images in a row. However I want to scan a few more pages and continue the established sequence of file names. However on an attempt to just click "Scan" I get an error message "Invalid argument" titled "Skanlite Test". The power outage resulted in a scanner reset, and the USB controller of my laptop probably detected device disconnect/connect cycle. STEPS TO REPRODUCE 1. Configure Skanlite to only ask for file name once and then increment a sequence number in the file name. 2. Scan some pages in Skanlite 3. Unplug USB and/or turn off the scanner. 4. Plug in USB and/or turn on the scanner. 5. Click "Scan". OBSERVED RESULT Warning "Invalid argument", the page is not scanned. EXPECTED RESULT Should scan the new page. SOFTWARE/OS VERSIONS Operating System: Fedora 31 KDE Plasma Version: 5.17.4 KDE Frameworks Version: 5.64.0 Qt Version: 5.12.5 Kernel Version: 5.3.15-300.fc31.x86_64 OS Type: 64-bit Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz Memory: 15,4 ГиБ ADDITIONAL INFORMATION skanlite 2.1.0.1 on Fedora 31. Package: skanlite-2.1.0.1-3.fc31.x86_64
If you power off the scanner while Skanlite is running, I'm afraid it will not recover, because the sane-backend does not know what happened and your only choice is to restart Skanlite. Restarting Skanlite in your situation should not be a problem as the sequence number is recalculated when you restart. It does not restart from 1 if there is a file already with that name. Can you verify that actually happens?
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!
(In reply to Kåre Särs from comment #1) > Restarting Skanlite in your situation should not be a problem as the > sequence number is recalculated when you restart. It does not restart from 1 > if there is a file already with that name. > > Can you verify that actually happens? I don't have physical access to a scanner at this time, cannot verify. Sorry. However restarting Skanlite seems like a workaround which requires extra steps from the user. Can Skanlite may be reinitialize sane-backend in a case of an error?