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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText>Gerhard Jäger wrote: "Are you talking about CanoScan N1240U? I'm pretty sure that the Plustek Backend does not support any N24OU device..."<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I am indeed talking about the Canon Canoscan N124OU. My "N24OU" in the header is a typo. Sorry.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>He also wrote, " Anyhow. Please try sane-find-scanner as root user."<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>sane-find-scanner gives me<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText> "found USB scanner (vendor=0x4a9, [Canon], product=0x220e [Canoscan] at libusb:001:002<o:p></o:p></p><p class=MsoPlainText># Your USB scanner was (probably) detected. It may or may not be supported by<o:p></o:p></p><p class=MsoPlainText>#SANE. Try scanimage -L and read the backend's manpage"<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>regardless of whether I'm signed on as root or with my normal user sign in. The difference is that when signed on with my usual sign-on I get additional output about how it is unable to check other USB devices at different locations due to insufficient permissions. Additionally, running sane-find-scanner -v -v as either as root or under my usual log on I still get the message<o:p></o:p></p><p class=MsoPlainText> <Couldn't determine the type of USB chip (result from sane-backends 1.0.24)>, although I get a lot of other information about the scanner. When running sane-find-scanner in verbose mode as root I get additional output regarding the devices that it was not able to check under my usual login.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Gerhard also wrote "Centos 7 and sane-1.0.24 are pretty old. Any chance to move to a more recent version?"<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>As I mentioned previously, I'm a linux newbie, and my selection of Centos was based on a relative's recommendation. I ran update a couple of days ago, so it should be current. I'm not married to Centos, other than through fear that by trying to change to something else I might be opening a can of worms. What would you suggest? As for sane-1.0.24, I originally was not aware that sane was available from the Centos repository, so I downloaded and installed it as a tarball from the sane website. I also installed libusb via a similar mechanism. I was not even able to get sane-find-scanner to detect the N124OU with that setup. I posted a plea for help on a Centos 7 website, and the moderator suggested I uninstall everything and install the Centos repository version via yum. I did so, and now at least the scanner is detected by sane-find-scanner. However I have no objection to trying a tarball version again if it might solve my problem.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Gerhart asks about the contents of /etc/sane.d/dll.conf.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>A copy of my current file is attached. It originally contained a long list of various manufacturers and models, but in my attempts to get scanimage -L to detect my scanner I commented out everything except "net" and "plustek" in an attempt to force SANE to use the plustek backend. I later uncommented "canon_dr" because I saw something somewhere that this might be relevant to the N124OU, but neither of these modifications were helpful. <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>The command "grep -v ^# /etc/sane.d/dll.conf" gives me the output:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>net<o:p></o:p></p><p class=MsoPlainText>canon_dr<o:p></o:p></p><p class=MsoPlainText>plustek<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Running the command " export SANE_DEBUG_PLUSTEK=20 ; scanimage -L" gives me:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>"No scanners were identified. If you were expecting something different check that the scanner is plugged in, turned on and detected by the sane-find-scanner tool (if appropriate). Please read the documentation which came with this software (README, FAQ, manpages)."<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I very much appreciate any and all efforts to help me solve this conundrum.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>