Daniel, Some additional info in the log file:
Thanks ubiquitous1980
hp-check[29672]: info: : Initializing. Please wait... scheduler is running 1.3.11 Linux localhost.localdomain 2.6.31-gentoo-r10 #2 SMP Thu Apr 22 22:02:49 WST 2010 x86_64 Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz GenuineIntel GNU/Linux hp-check[29672]: info: : hp-check[29672]: info: :--------------- hp-check[29672]: info: :| SYSTEM INFO | hp-check[29672]: info: :--------------- hp-check[29672]: info: : hp-check[29672]: info: :[01mBasic system information:[0m hp-check[29672]: info: :Linux localhost.localdomain 2.6.31-gentoo-r10 #2 SMP Thu Apr 22 22:02:49 WST 2010 x86_64 Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz GenuineIntel GNU/Linux hp-check[29672]: info: : hp-check[29672]: info: :[01mDistribution:[0m hp-check[29672]: info: :gentoo 0.0 hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking Python version...[0m hp-check[29672]: info: :OK, version 2.6.4 installed hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking PyQt 4.x version...[0m hp-check[29672]: info: :OK, version 4.7 installed. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for CUPS...[0m hp-check[29672]: info: :Status: scheduler is running hp-check[29672]: info: :Version: 1.3.11 hp-check[29672]: info: :error_log is set to level: info hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dbus/python-dbus...[0m hp-check[29672]: info: :dbus daemon is running. hp-check[29672]: info: :python-dbus version: 0.83.0 hp-check[29672]: info: : hp-check[29672]: info: : hp-check[29672]: info: :------------------------------------ hp-check[29672]: info: :| COMPILE AND RUNTIME DEPENDENCIES | hp-check[29672]: info: :------------------------------------ hp-check[29672]: info: : note: To check for compile-time only dependencies, re-run hp-check with the -c parameter (ie, hp-check -c). note: To check for run-time only dependencies, re-run hp-check with the -r parameter (ie, hp-check -r). hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: CUPS - Common Unix Printing System...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: CUPS devel- Common Unix Printing System development files...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: CUPS image - CUPS image development files...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: DBus - Message bus system...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: gcc - GNU Project C and C++ Compiler...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: GhostScript - PostScript and PDF language interpreter and previewer...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: libcrypto - OpenSSL cryptographic library...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: libjpeg - JPEG library...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: libnetsnmp-devel - SNMP networking library development files...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: libpthread - POSIX threads library...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: libtool - Library building support services...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: libusb - USB library...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: make - GNU make utility to maintain groups of programs...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: PIL - Python Imaging Library (required for commandline scanning with hp-scan)...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: PolicyKit - Administrative policy framework...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: PyQt 4 DBus - DBus Support for PyQt4...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: Python DBus - Python bindings for DBus...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: Python devel - Python development files...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: Python libnotify - Python bindings for the libnotify Desktop notifications...[0m warning: NOT FOUND! This is an OPTIONAL/RUNTIME ONLY dependency. Some HPLIP functionality may not function properly. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: Python XML libraries...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: Python 2.3 or greater - Required for fax functionality...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: Python 2.2 or greater - Python programming language...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: Reportlab - PDF library for Python...[0m warning: NOT FOUND! This is an OPTIONAL/RUNTIME ONLY dependency. Some HPLIP functionality may not function properly. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: SANE - Scanning library...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: SANE - Scanning library development files...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: scanimage - Shell scanning program...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for dependency: xsane - Graphical scanner frontend for SANE...[0m warning: NOT FOUND! This is an OPTIONAL/RUNTIME ONLY dependency. Some HPLIP functionality may not function properly. hp-check[29672]: info: : hp-check[29672]: info: : hp-check[29672]: info: :---------------------- hp-check[29672]: info: :| HPLIP INSTALLATION | hp-check[29672]: info: :---------------------- hp-check[29672]: info: : hp-check[29672]: info: : hp-check[29672]: info: :[01mCurrently installed HPLIP version...[0m hp-check[29672]: info: :HPLIP 3.9.12 currently installed in '/usr/share/hplip'. hp-check[29672]: info: : hp-check[29672]: info: :[01mCurrent contents of '/etc/hp/hplip.conf' file:[0m hp-check[29672]: info: :# hplip.conf. Generated from hplip.conf.in by configure. [hplip] version=3.9.12 [dirs] home=/usr/share/hplip run=/var/run ppd=/usr/share/ppd/HP ppdbase=/usr/share/ppd doc=/usr/share/doc/hplip-3.9.12 html=/usr/share/doc/hplip-3.9.12/html icon=/usr/share/applications cupsbackend=/usr/libexec/cups/backend cupsfilter=/usr/libexec/cups/filter drv=/usr/share/cups/drv/hp # Following values are determined at configure time and cannot be changed. [configure] network-build=yes pp-build=no gui-build=yes scanner-build=yes fax-build=no dbus-build=yes cups11-build=no doc-build=no shadow-build=no hpijs-install=no foomatic-drv-install=no foomatic-ppd-install=no foomatic-rip-hplip-install=no hpcups-install=yes cups-drv-install=yes cups-ppd-install=no internal-tag=3.9.12.29 restricted-build=no ui-toolkit=qt4 qt3=no qt4=yes policy-kit=no hpijs-only-build=no lite-build=no udev-acl-rules=no hpcups-only-build=no hpijs-only-build=no hp-check[29672]: info: : hp-check[29672]: info: :[01mCurrent contents of '/var/lib/hp/hplip.state' file:[0m hp-check[29672]: info: :# hplip.state - HPLIP runtime persistent variables. [plugin] installed=0 eula=0 hp-check[29672]: info: : hp-check[29672]: info: :[01mCurrent contents of '~/.hplip/hplip.conf' file:[0m hp-check[29672]: info: :[last_used] printer_name = Photosmart_C5100 working_dir = . device_uri = "hp:/usb/Photosmart_C5100_series?serial=MY65SB210504MK" [commands] scan = /usr/bin/xsane -V %SANE_URI% [installation] version = 3.9.12.29 date_time = 04/23/10 12:12:21 [settings] systray_messages = 0 systray_visible = 0 [fax] email_address = voice_phone = [refresh] rate = 30 enable = false type = 1 [polling] enable = false device_list = interval = 5 hp-check[29672]: info: : hp-check[29672]: info: :-------------------------- hp-check[29672]: info: :| DISCOVERED USB DEVICES | hp-check[29672]: info: :-------------------------- hp-check[29672]: info: : hp-check[29672]: info: : Device URI Model hp-check[29672]: info: : -------------------------------- -------------------------- hp-check[29672]: info: : hp:/usb/Photosmart_C5100_series? HP Photosmart C5100 series serial=MY65SB210504MK hp-check[29672]: info: : hp-check[29672]: info: :--------------------------------- hp-check[29672]: info: :| INSTALLED CUPS PRINTER QUEUES | hp-check[29672]: info: :--------------------------------- hp-check[29672]: info: : hp-check[29672]: info: : hp-check[29672]: info: :[01mPhotosmart_C5100[0m hp-check[29672]: info: :[01m----------------[0m hp-check[29672]: info: :Type: Printer hp-check[29672]: info: :Device URI: hp:/usb/Photosmart_C5100_series?serial=MY65SB210504MK hp-check[29672]: info: :PPD: /etc/cups/ppd/Photosmart_C5100.ppd hp-check[29672]: info: :PPD Description: HP Photosmart c5100 Series, hpcups 3.9.12 hp-check[29672]: info: :Printer status: printer Photosmart_C5100 disabled since Fri 23 Apr 2010 12:11:37 WST - /usr/libexec/cups/backend/hp failed hp-check[29672]: info: :Communication status: Good hp-check[29672]: info: : hp-check[29672]: info: : hp-check[29672]: info: :---------------------- hp-check[29672]: info: :| SANE CONFIGURATION | hp-check[29672]: info: :---------------------- hp-check[29672]: info: : hp-check[29672]: info: :[01m'hpaio' in '/etc/sane.d/dll.conf'...[0m hp-check[29672]: info: :OK, found. SANE backend 'hpaio' is properly set up. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking output of 'scanimage -L'...[0m hp-check[29672]: info: :device `hpaio:/usb/Photosmart_C5100_series?serial=MY65SB210504MK' is a Hewlett-Packard Photosmart_C5100_series all-in-one hp-check[29672]: info: : hp-check[29672]: info: :--------------------- hp-check[29672]: info: :| PYTHON EXTENSIONS | hp-check[29672]: info: :--------------------- hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking 'cupsext' CUPS extension...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking 'pcardext' Photocard extension...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking 'hpmudext' I/O extension...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking 'scanext' SANE scanning extension...[0m hp-check[29672]: info: :OK, found. hp-check[29672]: info: : hp-check[29672]: info: : hp-check[29672]: info: : hp-check[29672]: info: :----------------- hp-check[29672]: info: :| USB I/O SETUP | hp-check[29672]: info: :----------------- hp-check[29672]: info: : hp-check[29672]: info: :[01mChecking for permissions of USB attached printers...[0m hp-check[29672]: info: : HP Device 0x5811 at 005:004: hp-check[29672]: info: : Device URI: hp:/usb/Photosmart_C5100_series?serial=MY65SB210504MK hp-check[29672]: info: : Device node: /dev/bus/usb/005/004 hp-check[29672]: info: : Mode: 0664 hp-check[29672]: info: :getfacl: Removing leading '/' from absolute path names # file: dev/bus/usb/005/004 # owner: root # group: scanner user::rw- group::rw- other::r-- hp-check[29672]: info: : hp-check[29672]: info: :--------------- hp-check[29672]: info: :| USER GROUPS | hp-check[29672]: info: :--------------- hp-check[29672]: info: : hp-check[29672]: info: :adm disk lp wheel uucp audio cdrom dialout video games cdrw usb users haldaemon plugdev gdm ubiquitous1980 polkituser scanner hp-check[29672]: info: : hp-check[29672]: info: :----------- hp-check[29672]: info: :| SUMMARY | hp-check[29672]: info: :----------- hp-check[29672]: info: : error: 3 errors and/or warnings. hp-check[29672]: info: : hp-check[29672]: info: :Please refer to the installation instructions at: hp-check[29672]: info: :http://hplip.sourceforge.net/install/index.html hp-check[29672]: info: : hp-check[29672]: info: :Done.