1. Please find the log below: << georg@zulia:~$ hp-toolbox -g HP Linux Imaging and Printing System (ver. 3.12.2) HP Device Manager ver. 15.0 Copyright (c) 2001-9 Hewlett-Packard Development Company, LP This software comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to distribute it under certain conditions. See COPYING file for more details. hp-toolbox(UI)[3504]: debug: Initializing toolbox UI (Qt4)... hp-toolbox(UI)[3504]: debug: HPLIP Version: 3.12.2 hp-toolbox(UI)[3504]: debug: Loading user settings... hp-toolbox(UI)[3504]: debug: FAB command: /usr/bin/hp-fab hp-toolbox(UI)[3504]: debug: Scan command: /usr/bin/simple-scan %SANE_URI% hp-toolbox(UI)[3504]: debug: Auto refresh: True hp-toolbox(UI)[3504]: debug: Auto refresh rate: 30 hp-toolbox(UI)[3504]: debug: Auto refresh type: 2 hp-toolbox(UI)[3504]: debug: Systray visible: 0 hp-toolbox(UI)[3504]: debug: Systray messages: 0 hp-toolbox(UI)[3504]: debug: Last used device URI: hpfax:/net/Officejet_Pro_8600?zc=dhcppc9 hp-toolbox(UI)[3504]: debug: Last used printer: Officejet_Pro_8600 hp-toolbox(UI)[3504]: debug: Working directory: . hp-toolbox(UI)[3504]: debug: Connecting to com.hplip.StatusService (try #1)... hp-toolbox(UI)[3504]: debug: Starting GUI loop... hp-toolbox(UI)[3504]: debug: Rescanning device list... hp-toolbox(UI)[3504]: debug: hp:/net/Officejet_Pro_8600?zc=dhcppc9: back_end:hp is_hp:True bus:net model:Officejet_Pro_8600 serial: dev_file: host:dhcppc9 zc:dhcppc9 port:1 hp-toolbox(UI)[3504]: debug: Cache miss: officejet_pro_8600 hp-toolbox(UI)[3504]: debug: Reading file: /usr/share/hplip/data/models/models.dat hp-toolbox(UI)[3504]: debug: Searching for section [officejet_pro_8600] in file /usr/share/hplip/data/models/models.dat hp-toolbox(UI)[3504]: debug: Found section [officejet_pro_8600] in file /usr/share/hplip/data/models/models.dat hp-toolbox(UI)[3504]: debug: hpfax:/net/Officejet_Pro_8600?zc=dhcppc9: back_end:hpfax is_hp:True bus:net model:Officejet_Pro_8600 serial: dev_file: host:dhcppc9 zc:dhcppc9 port:1 hp-toolbox(UI)[3504]: debug: Adds: hpfax:/net/Officejet_Pro_8600?zc=dhcppc9,hp:/net/Officejet_Pro_8600?zc=dhcppc9 hp-toolbox(UI)[3504]: debug: Removals (1): hp-toolbox(UI)[3504]: debug: Updates: hp-toolbox(UI)[3504]: debug: adding: hpfax:/net/Officejet_Pro_8600?zc=dhcppc9 hp-toolbox(UI)[3504]: debug: Device URI: hpfax:/net/Officejet_Pro_8600?zc=dhcppc9 hp-toolbox(UI)[3504]: debug: Printer: None hp-toolbox(UI)[3504]: debug: hpfax:/net/Officejet_Pro_8600?zc=dhcppc9: back_end:hpfax is_hp:True bus:net model:Officejet_Pro_8600 serial: dev_file: host:dhcppc9 zc:dhcppc9 port:1 hp-toolbox(UI)[3504]: debug: URI: backend=hpfax, is_hp=True, bus=net, model=Officejet_Pro_8600, serial=, dev=, host=dhcppc9, port=1 hp-toolbox(UI)[3504]: debug: Model/UI model: Officejet_Pro_8600/HP Officejet Pro 8600 hp-toolbox(UI)[3504]: debug: hpfax:/net/Officejet_Pro_8600?zc=dhcppc9: back_end:hpfax is_hp:True bus:net model:Officejet_Pro_8600 serial: dev_file: host:dhcppc9 zc:dhcppc9 port:1 hp-toolbox(UI)[3504]: debug: Re-reading CUPS printer queue information. hp-toolbox(UI)[3504]: debug: adding: hp:/net/Officejet_Pro_8600?zc=dhcppc9 hp-toolbox(UI)[3504]: debug: Device URI: hp:/net/Officejet_Pro_8600?zc=dhcppc9 hp-toolbox(UI)[3504]: debug: Printer: None hp-toolbox(UI)[3504]: debug: hp:/net/Officejet_Pro_8600?zc=dhcppc9: back_end:hp is_hp:True bus:net model:Officejet_Pro_8600 serial: dev_file: host:dhcppc9 zc:dhcppc9 port:1 hp-toolbox(UI)[3504]: debug: URI: backend=hp, is_hp=True, bus=net, model=Officejet_Pro_8600, serial=, dev=, host=dhcppc9, port=1 hp-toolbox(UI)[3504]: debug: Model/UI model: Officejet_Pro_8600/HP Officejet Pro 8600 hp-toolbox(UI)[3504]: debug: hp:/net/Officejet_Pro_8600?zc=dhcppc9: back_end:hp is_hp:True bus:net model:Officejet_Pro_8600 serial: dev_file: host:dhcppc9 zc:dhcppc9 port:1 hp-toolbox(UI)[3504]: debug: Re-reading CUPS printer queue information. hp-toolbox(UI)[3504]: debug: Removals (2): hp-toolbox(UI)[3504]: debug: Re-reading CUPS printer queue information. hp-toolbox(UI)[3504]: debug: Saving user settings... hp-toolbox(UI)[3504]: debug: updateDevice(hpfax:/net/Officejet_Pro_8600?zc=dhcppc9) hp-toolbox(UI)[3504]: debug: Sending event 9010 to com.hplip.StatusService (via dbus)... hp-toolbox(UI)[3504]: debug: updateDevice(hp:/net/Officejet_Pro_8600?zc=dhcppc9) hp-toolbox(UI)[3504]: debug: Sending event 9010 to com.hplip.StatusService (via dbus)... hp-toolbox(UI)[3504]: debug: Handling event... hp-toolbox(UI)[3504]: debug: device_uri=hpfax:/net/Officejet_Pro_8600?zc=dhcppc9 hp-toolbox(UI)[3504]: debug: printer_name= hp-toolbox(UI)[3504]: debug: event_code=9003 hp-toolbox(UI)[3504]: debug: username=georg hp-toolbox(UI)[3504]: debug: job_id=0 hp-toolbox(UI)[3504]: debug: title= hp-toolbox(UI)[3504]: debug: timedate=1330184904.28 hp-toolbox(UI)[3504]: debug: EVENT_HISTORY_UPDATE (hpfax:/net/Officejet_Pro_8600?zc=dhcppc9) hp-toolbox(UI)[3504]: debug: Handling event... hp-toolbox(UI)[3504]: debug: device_uri=hpfax:/net/Officejet_Pro_8600?zc=dhcppc9 hp-toolbox(UI)[3504]: debug: printer_name= hp-toolbox(UI)[3504]: debug: event_code=9011 hp-toolbox(UI)[3504]: debug: username=georg hp-toolbox(UI)[3504]: debug: job_id=0 hp-toolbox(UI)[3504]: debug: title= hp-toolbox(UI)[3504]: debug: timedate=1330184904.28 hp-toolbox(UI)[3504]: debug: EVENT_DEVICE_UPDATE_REPLY (hpfax:/net/Officejet_Pro_8600?zc=dhcppc9) hp-toolbox(UI)[3504]: debug: updateDevice(hpfax:/net/Officejet_Pro_8600?zc=dhcppc9) hp-toolbox(UI)[3504]: debug: Re-reading CUPS printer queue information. hp-toolbox(UI)[3504]: debug: updateCurrentTab() hp-toolbox(UI)[3504]: debug: hpfax:/net/Officejet_Pro_8600?zc=dhcppc9: back_end:hpfax is_hp:True bus:net model:Officejet_Pro_8600 serial: dev_file: host:dhcppc9 zc:dhcppc9 port:1 hp-toolbox(UI)[3504]: debug: updateDevice(hpfax:/net/Officejet_Pro_8600?zc=dhcppc9) hp-toolbox(UI)[3504]: debug: Re-reading CUPS printer queue information. hp-toolbox(UI)[3504]: debug: updateCurrentTab() hp-toolbox(UI)[3504]: debug: hpfax:/net/Officejet_Pro_8600?zc=dhcppc9: back_end:hpfax is_hp:True bus:net model:Officejet_Pro_8600 serial: dev_file: host:dhcppc9 zc:dhcppc9 port:1 hp-toolbox(UI)[3504]: debug: Cleaning up child processes. hp-toolbox(UI)[3504]: debug: Cleaning up child processes. hp-toolbox(UI)[3504]: debug: Handling event... hp-toolbox(UI)[3504]: debug: device_uri=hp:/net/Officejet_Pro_8600?zc=dhcppc9 hp-toolbox(UI)[3504]: debug: printer_name= hp-toolbox(UI)[3504]: debug: event_code=9003 hp-toolbox(UI)[3504]: debug: username=georg hp-toolbox(UI)[3504]: debug: job_id=0 hp-toolbox(UI)[3504]: debug: title= hp-toolbox(UI)[3504]: debug: timedate=1330184925.39 hp-toolbox(UI)[3504]: debug: EVENT_HISTORY_UPDATE (hp:/net/Officejet_Pro_8600?zc=dhcppc9) hp-toolbox(UI)[3504]: debug: Handling event... hp-toolbox(UI)[3504]: debug: device_uri=hp:/net/Officejet_Pro_8600?zc=dhcppc9 hp-toolbox(UI)[3504]: debug: printer_name= hp-toolbox(UI)[3504]: debug: event_code=9011 hp-toolbox(UI)[3504]: debug: username=georg hp-toolbox(UI)[3504]: debug: job_id=0 hp-toolbox(UI)[3504]: debug: title= hp-toolbox(UI)[3504]: debug: timedate=1330184925.39 hp-toolbox(UI)[3504]: debug: EVENT_DEVICE_UPDATE_REPLY (hp:/net/Officejet_Pro_8600?zc=dhcppc9) hp-toolbox(UI)[3504]: debug: Unlocking: /home/georg/.hplip/hp-toolbox.lock georg@zulia:~$ 2. Please find the screen shots attached. 3. The printer is connected. If I delete the printer and add it again, it finds it and it works. But after next reboot, the problem usually comes again. Thanks & regards, Georg Profos >> Quoting / Zitat von goutamkk