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I had this occur to me as well...intermittently....going from 12.04 to 14.04 using my old V100 Photo (USB). It had worked completely smoothly before the upgrade. I tried many things before finally finding the fix. During the upgrade to 14.04, the .conf files were overwritten. I, of course, edited epson.conf with correct address. In looking at the issue ...


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I have an Epson XP-312 printer-scanner and have found that it's possible to scan with the firewall enabled if I add the following ufw rules via the terminal: sudo ufw allow 1865 sudo ufw allow out 1865 Though it only works when connected to the printer-scanner with a USB cable. Hope this helps.


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I ran into the same issue, and according to https://wiki.debianforum.de/Brother_Scanner the "Invalid Argument" error can be caused if the printer is connected to an USB 3 port (controlled by xhci_hcd). It started working for me as soon as I switched to an USB 2 port (controlled by ehci_hcd).


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I ran into the same issue, and according to https://wiki.debianforum.de/Brother_Scanner the "Invalid Argument" error can be caused if the printer is connected to an USB 3 port (controlled by xhci_hcd). It started working for me as soon as I switched to an USB 2 port (controlled by ehci_hcd).


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I suggest checking the drivers. My printer has a separate printer and scanner driver for Linux, and I had to install both. For windows it's usually all a single software package. With Linux it might look like a single software package but be careful, especially if it came as a tarball. Dora


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i have faced similar problem with barcode reader, i ended up buying a wireless barcode reader from ebay which acts like a wireless keyboard. As such, the ubuntu doesnt have to have any special driver to interpret the barcode signal, instead, the barcode reader decipher the code and send it as text to the computer. here is a link to the barcode reader i ...



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