M. Allan Noah wrote:
>From the release notes of our last release: Note 3: The Linux USB3 workaround which was added in version 1.0.25 is now disabled by default. If you have difficulty using a scanner which previously worked, or intermittent scanner availability, try setting the new environment variable SANE_USB_WORKAROUND=1 before starting your frontend. I had previously seen that note, but I concluded from info on my motherboard manufacture's website (Supermicro) that the back panel USB ports where 2.0, and therefore the note was not relevant to my issue. It turns out that I was incorrect: based on 3.0 ports being blue and 2.0 ports being black, my back panel has both. However the scanner is plugged into a black (USB 2.0) one. Nonetheless, I rebooted the server, ran export SANE_USB_WORKAROUND=1, export SANE_DEBUG_PLUSTEK=128, and then scanimage -L. I got the same results as previously, i.e. scanner not ready, However, unlike previous results, when I ran scanimage -L a second time it still apparently found the scanner, and there was no "scanner not ready" message in the debug file. I then ran scanimage with a filename to direct the results into, and it seems to have worked; I heard the scanner doing it's thing and there are multiple new files in my home directory. I haven't figured out how to view the image file yet, or move it over the network to where I need it to be, but it appears that my immediate problem is solved. Thanks to everyone for their patience and useful suggestions.
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