Network printer: maybe not connected?
I connected to a network printer and I could print a test page. However, when I wanted to print anything else, it got blocked and the printer status was “maybe not connected”.
Start the CUPS daemon on your machine:
sudo service cups status
Then you should see something similar:
cups start/running, process 897
Printing should work now.
Start cupsd on boot
After upgrading to Ubuntu 11.10, cupsd didn’t start automatically on boot. Here I found the following fix:
sudo apt-get install --reinstall cups