Johannes, Thanks for the link. I can see that it's a difficult problem. In general I believe being able to start/stop a printer should be possible in the typical SOHO environment without being root. This is two steps behind adding or modifying a printer as described in fate#313287, and it's necessary in particular because of CUPS' default "stop-printer" error policy. (ok, I just saw that this policy can be changed via the YaST printer dialog). This goes far beyond the scope of this bz which is about the HPLIP GUI's erratic behavior. I have to admit that I like that GUI in general, it's way more useful than the pathetic GNOME printer "configuration" dialog. But it's bad that it offers functionality that doesn't work on most standard configurations (such as "start/stop printer", and it's worse that it hangs rather than displaying an error dialog if something goes wrong. Martin