Comment 44 for bug 96454

Some extra remarks:

- when I want to operate the HPLIP Toolbox now, it gives the error: device not found. The toolbox is still partly functional, though: I can influence the print quality settings.

- The only way to start HPLIP Toolbox now without errors, is to start it in the terminal, as root: gksudo hp-toolbox
I suppose that it is the same problem as with my separate Epson scanner, which will only start with sudo xsane. Intelligent hardware connected through USB, needs root permission to function. Some security setting buried deep in Linux, I fear.

- it wasn't necessary to start the Toolbox as root, to start the sequence I described in my earlier post.

- I have a Laserjet 1018.