Same issue on 16.04, x64 fully updated. Unity desktop. File /etc/xdg/autostart/indicator-printers.desktop present, content unaltered. Manually exectuting /usr/lib/x86_64-linux-gnu/indicator-printers/indicator-printers-service fixes issue until reboot.
Same issue on 16.04, x64 fully updated. autostart/ indicator- printers. desktop present, content unaltered. x86_64- linux-gnu/ indicator- printers/ indicator- printers- service fixes issue until reboot.
Unity desktop.
File /etc/xdg/
Manually exectuting /usr/lib/