If you right-click on the printer icon in the system tray (or just kill the 'system-config-printer-applet' process) and then run:
system-config-printer-applet --debug
It would be instructive to see the debugging output when you try to authenticate a job. Print a job, wait for the authentication notification to appear, click 'Authenticate', and then enter your details and click OK.
If you right-click on the printer icon in the system tray (or just kill the 'system- config- printer- applet' process) and then run: config- printer- applet --debug
system-
It would be instructive to see the debugging output when you try to authenticate a job. Print a job, wait for the authentication notification to appear, click 'Authenticate', and then enter your details and click OK.