Check the scanner's status." I installed the XSane Image scanning program via the Synaptic Package Manager this one told me it "Failed to open device," (the HP scanner), "invalid argument" (which is the kind of remark I would expect from a philosophy professor, not a scanner app). I installed Image Scan! for Linux from, which told me "Could not send command to scanner. Some other things I did that didn't help, even with the laptop disconnected from the LAN: I downloaded and installed the Epson scanner drivers from. Preferences still showed the HP that I had previously used, but not the DS-510. Sometimes when I disconnected the DS-510 the Epson all-in-one would disappear from the preferences list, so I thought maybe the two Epson scanners were getting confused. Finally, before completing your diagnostic, turn off any other similar devices in the area to ensure that there is not some type of confusion in the system hat is keeping you from connecting. That means the scanner is OK, the software is OK, the USB is OK, but they don't work together. If you are connecting the scanner to a USB hub, go ahead and attach the USB to the motherboard in the interim in order to check if that’s a problem. I have an external drive and a mouse connected to the laptop via USB and they're OK. I connected the DS-510 to a Windows XP machine with Epson Scan installed, and it worked, but I want to use the laptop. I actually did a few scans with the HP but it was too slow. Preferences showed two all-in-ones on the LAN, an Epson and an HP, but not the D-510.
It worked before, maybe under a different version. Linux Mint 17.3 64 bit, xfce desktop on an eMachines E520 laptop.
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