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I previously had issues with printing with my printer on Ubuntu 20.04.3 LTS Unable to use my HP 4520 All-In-One

After solving that problem with @Waltinator 's & other's help, I still am unable to scan using the scanner. I tried to understand the group permissions instructions on the above link but wasn't able to figure them out. For example, when I checked ls -l, it didn't show anything that appeared to be permissions for the printer or scanner. Is that "snap"?

When I use the application called "hp-uiscan" it claims "No Device Connected" When I press scan on my HP4520, it says "No computer found" make sure it is turned on. The inbuilt HP Device manager doesn't seem to have any scanner options.

I also used the instructions found here: But sudo apt-get install hplip-gui did not work after I went through the GUI because it did not give any options related to a printer or for the driver.

Please advise. Thanks.

216ann
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2 Answers2

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I found out that hp-uiscan does not support MFP (Multi Function Printers) devices. There is only a limited device list of supported scanners. MFP printers are disabled programmatically by a filter list.

Btw, scanning only works if the sane backend is installed. ;-)

If you want to use the scan button on your printer I can recommend the Scan2Folder tool. You can download it at https://github.com/AlfredoCubitos/Scan2Folder

Alfredo cubitos
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So finally to solve this issue, I used the hp-setup per instructions here: https://www.cyberciti.biz/faq/how-to-install-networked-hp-printer-and-scanner-on-ubuntu-linux/
I used the usb connection.
I could not get the toolbox to work (it strangely scanned only the top of each page even though the settings showed that it was set to scan the entire page) so I had to use Simple Scan app that is already built into Gnome.
I never thought it would be this simple especially since I had asked this question before & got really complicated answers. Hope this helps newbies like myself. Thanks to all the folks who gave me pointers along the way. I was able to get my impt docs scanned & sent.

216ann
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