Comment 11 for bug 480859

Rocky:

Could you run "lsusb" and post the output. Then run "sudo lsusb" and post the output. If the printer shows up when you run "sudo lsusb" then the issue lies in a rule file that is not being properly utilized by Ubuntu.

If the printer is showing as belonging to the "lp" group then you need to run the following command, log out, and log back in:

"usermod -a -Glp <yourUserName>"

After logging back in I recommend going to the cups site (localhost:631) and deleting the printer that you have installed. Once this is complete you should be able to install your printer through hp-setup.

If this does not work then you can:
1. Go to the localhost:631 site
2. Click on Administration
3. Click on add printer
4. Choose the printer that is labeled as "HP DESKJET 520 ... ...HPLIP (HP DESKJET 520)" **it is very important that you choose the printer that says HPLIP because it will be using the HP backend rather than the USB backend
5. Click Continue on that page and the next one
6. Select the correct ppd in the "Models" box. The correct ppd to use for 3.9.10 would be labeled "HP Deskjet 520, hpcups 3.9.10 (en)"
7. Click add

After doing this you still may need to add yourself to the lp group as listed above to ensure that you have full functionality.

Hope this helps.

Jason