Pre-post: Even though my system is Ubuntu, I posted it here because I feel like the problem isn't related to my distribution.  This is pretty strange.  I've hooked up an HP printer to my computer via Wi-Fi. Its name is SahibPrinter.I learned about the lp and lpr commands, and so I decided to test them:$ lp -d SahibPrinter -- example.txtIt prints fine. The problem is after the printing.  I'm using GNOME, so the exact results may vary depending on your DE. But, at the top of my screen, where notifications are, I get the exact same dialog:Printing aborted at (stdin): SahibPrinterI know for sure that the lp process is gone. However, this dialog appears every 2 minuters or so, even after I've stopped the printing.  So, how can I not make this dialog appear when I print using lp? 
Printing from the command-line returns aborting from (stdin) in an infinite cycle
ubuntu;printing;notifications;lp