I can add that on my dad's machine (upgraded from 8.04 to 10.04 yesterday, 32bit) the problem happens with an hplib-based printer when the printer is *not* turned on on boot.
If it is turned on, cups is started + a HP-logo appears in the gnome sys tray.
"sudo service cups start" works as well of course. Then no HP-logo appears, but printing is ok.
I can add that on my dad's machine (upgraded from 8.04 to 10.04 yesterday, 32bit) the problem happens with an hplib-based printer when the printer is *not* turned on on boot.
If it is turned on, cups is started + a HP-logo appears in the gnome sys tray.
"sudo service cups start" works as well of course. Then no HP-logo appears, but printing is ok.