I keep getting the following error dialog:

"Timeout when trying to execute 'su'"

Usually when I'm trying to Print.

As I'm a newbe, any assistance would be greatly appreciated.

Not sure if this is related to an error I get on boot:

"Could not lookup internet address for x1-6-00-07-e9-5f-74-63"

It may be possible to correct the problem by adding x1-6-00-07-e9-5f-74-63 to the file /etc/hosts