After upgrading from V12.04 to V14.04 I am not able to print. I am using an HP LaserJet 400 M451dn. The printer troubleshooter told me that there is no solution to the problem.
This is the output of the advanced diagnositc output. (Due to limited space I cut the output!)
Can anybody tell me what is going wrong. I am using the printer via USB ?
Page 1 (Scheduler not running?):
{'cups_connection_failure': False}
Page 2 (Is local server publishing?):
{'local_server_exporting_printers': False}
Page 3 (Choose printer):
{'cups_dest': ,
 'cups_instance': None,
 'cups_queue': u'HP-LaserJet-400-color-M451dn',
 'cups_queue_listed': True}
Page 4 (Check printer sanity):
{'cups_device_uri_scheme': u'hp',
 'cups_printer_dict': {'device-uri': u'hp:/usb/HP_LaserJet_400_color_M451dn?serial=CNFF308670',
                       'printer-info': u'Hewlett-Packard HP LaserJet 400 color M451dn',
                       'printer-is-shared': True,
                       'printer-location': u'Pinatubo',
                       'printer-make-and-model': u'HP LJ 300-400 color M351-M451 Postscript (recommended)',
                       'printer-state': 4,
                       'printer-state-message': u'',
                       'printer-state-reasons': [u'none'],
                       'printer-type': 8556636,
                       'printer-uri-supported': u'ipp://localhost:631/printers/HP-LaserJet-400-color-M451dn'},
 'cups_printer_remote': False,
 'hplip_output': (['',
                   '\x1b[01mHP Linux Imaging and Printing System (ver. 3.14.6)\x1b[0m',
                   '\x1b[01mDevice Information Utility ver. 5.2\x1b[0m',
                   '',
                   'Copyright (c) 2001-13 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.',
                   '',
                   '',
                   '\x1b[01mhp:/usb/HP_LaserJet_400_color_M451dn?serial=CNFF308670\x1b[0m',
                   '',
                   '\x1b[01mDevice Parameters (dynamic data):\x1b[0m',
                   '\x1b[01m  Parameter                     Value(s)                                                  \x1b[0m',
                   '  ----------------------------  ----------------------------------------------------------',
                   '  back-end                      hp                                                        ',
                   "  cups-printers                 ['HP-LaserJet-400-color-M451dn']                          ",
                   '  cups-uri                      hp:/usb/HP_LaserJet_400_color_M451dn?serial=CNFF308670    ',
                   '  dev-file                                                                                ',
                   '  device-state                  -1                                                        ',
                   '  device-uri                    hp:/usb/HP_LaserJet_400_color_M451dn?serial=CNFF308670    ',
                   '  deviceid                                                                                ',
                   '  error-state                   101                                                       ',
                   '  host                                                                                    ',
                   '  is-hp                         True                                                      ',
                   '  panel                         0                                                         ',
                   '  panel-line1                                                                             ',
                   '  panel-line2                                                                             ',
                   '  port                          1                                                         ',
                   '  serial                        CNFF308670                                                ',
                   '  status-code                   5002                                                      ',
                   '  status-desc                                                                             ',
                   '\x1b[01m',
                   'Model Parameters (static data):\x1b[0m',
                   '\x1b[01m  Parameter                     Value(s)                                                  \x1b[0m',
                   '  ----------------------------  ----------------------------------------------------------',
                   '  align-type                    0                                                         ',
                   '  clean-type                    0                                                         ',
                   '  color-cal-type                0                                                         ',
                   '  copy-type                     0                                                         ',
                   '  embedded-server-type          0                                                         ',
                   '  fax-type                      0                                                         ',
                   '  fw-download                   False                                                     ',
                   '  icon                          hp_color_laserjet_cp2025.png                              ',
                   '  io-mfp-mode                   1                                                         ',
                   '  io-mode                       1                                                         ',
                   '  io-support                    6                                                         ',
                   '  job-storage                   0                                                         ',
                   '  linefeed-cal-type             0                                                         ',
                   '  model                         HP_LaserJet_400_color_M451dn                              ',
                   '  model-ui                      HP LaserJet 400 Color m451dn                              ',
                   '  model1                        HP LaserJet 400 Color M451dn                              ',
                   '  monitor-type                  0                                                         ',
                   '  panel-check-type              0                                                         ',
                   '  pcard-type                    0                                                         ',
                   '  plugin                        0                                                         ',
                   '  plugin-reason                 0                                                         ',
                   '  power-settings                0                                                         ',
                   '  ppd-name                      lj_300_400_color_m351_m451                                ',
                   '  pq-diag-type                  0                                                         ',
                   '  r-type                        0                                                         ',
                   '  r0-agent1-kind                4                                                         ',
                   '  r0-agent1-sku                 CE410A/CE410X                                             ',
                   '  r0-agent1-type                1                                                         ',
                   '  r0-agent2-kind                4                                                         ',
                   '  r0-agent2-sku                 CE411A                                                    ',
                   '  r0-agent2-type                4                                                         ',
                   '  r0-agent3-kind                4                                                         ',
                   '  r0-agent3-sku                 CE413A                                                    ',
                   '  r0-agent3-type                5                                                         ',
                   '  r0-agent4-kind                4                                                         ',
                   '  r0-agent4-sku                 CE412A                                                    ',
                   '  r0-agent4-type                6                                                         ',
                   '  scan-src                      0                                                         ',
                   '  scan-type                     0                                                         ',
                   '  status-battery-check          0                                                         ',
                   '  status-dynamic-counters       0                                                         ',
                   '  status-type                   3                                                         ',
                   '  support-released              True                                                      ',
                   '  support-subtype               2202411                                                   ',
                   '  support-type                  2                                                         ',
                   '  support-ver                   3.12.2                                                    ',
                   "  tech-class                    ['Postscript']                                            ",
                   "  tech-subclass                 ['Normal']                                                ",
                   '  tech-type                     4                                                         ',
                   '  usb-pid                       3882                                                      ',
                   '  usb-vid                       1008                                                      ',
                   '  wifi-config                   0                                                         ',
                   '\x1b[01m',
                   'Status History (most recent first):\x1b[0m',
                   '\x1b[01m  Date/Time             Code   Status Description                        User      Job ID  \x1b[0m',
                   '  --------------------  -----  ----------------------------------------  --------  --------',
                   '  08/21/14 00:07:25     5012   Device communication error                richard   0       ',
                   '  08/20/14 13:42:44     500    Started a print job                       richard   4214    ',
                   '',
                   '',
                   'Done.',
                   ''],
                  ['\x1b[35;01mwarning: No display found.\x1b[0m',
                   '\x1b[31;01merror: hp-info -u/--gui requires Qt4 GUI support. Entering interactive mode.\x1b[0m',
                   '\x1b[31;01merror: Unable to communicate with device (code=12): hp:/usb/HP_LaserJet_400_color_M451dn?serial=CNFF308670\x1b[0m',
                   '\x1b[31;01merror: Error opening device (Device not found).\x1b[0m',
                   ''],
                  0),
 'is_cups_class': False,
 'local_cups_queue_attributes': {'charset-configured': u'utf-8',
                                 'charset-supported': [u'us-ascii', u'utf-8'],
                                 'color-supported': True,
                                 'compression-supported': [u'none', u'gzip'],
                                 'copies-default': 1,
                                 'copies-supported': (1, 9999),
                                 'cups-version': u'1.7.2',
                                 'device-uri': u'hp:/usb/HP_LaserJet_400_color_M451dn?serial=CNFF308670',
                                 'document-format-default': u'application/octet-stream',
                                 'document-format-supported': [u'application/octet-stream',
                                                               u'application/pdf',
                                                               u'application/postscript',
                                                               u'application/vnd.adobe-reader-postscript',
                                                               u'application/vnd.cups-command',
                                                               u'application/vnd.cups-pdf',
                                                               u'application/vnd.cups-pdf-banner',
                                                               u'application/vnd.cups-postscript',
                                                               u'application/vnd.cups-raw',
                                                               u'application/vnd.samsung-ps',
                                                               u'application/x-cshell',
                                                               u'application/x-csource',
                                                               u'application/x-perl',
                                                               u'application/x-shell',
                                                               u'image/gif',
                                                               u'image/jpeg',
                                                               u'image/png',
                                                               u'image/tiff',
                                                               u'image/urf',
                                                               u'image/x-bitmap',
                                                               u'image/x-photocd',
                                                               u'image/x-portable-anymap',
                                                               u'image/x-portable-bitmap',
                                                               u'image/x-portable-graymap',
                                                               u'image/x-portable-pixmap',
                                                               u'image/x-sgi-rgb',
                                                               u'image/x-sun-raster',
                                                               u'image/x-xbitmap',
                                                               u'image/x-xpixmap',
                                                               u'image/x-xwindowdump',
                                                               u'text/css',
                                                               u'text/html',
                                                               u'text/plain'],
                                 'finishings-default': 3,
                                 'finishings-supported': [3],
                                 'generated-natural-language-supported': [u'en-us'],
                                 'ipp-versions-supported': [u'1.0',
                                                            u'1.1',
                                                            u'2.0',
                                                            u'2.1'],
                                 'ippget-event-life': 15,
                                 'job-creation-attributes-supported': [u'copies',
                                                                       u'finishings',
                                                                       u'ipp-attribute-fidelity',
                                                                       u'job-hold-until',
                                                                       u'job-name',
                                                                       u'job-priority',
                                                                       u'job-sheets',
                                                                       u'media',
                                                                       u'media-col',
                                                                       u'multiple-document-handling',
                                                                       u'number-up',
                                                                       u'output-bin',
                                                                       u'orientation-requested',
                                                                       u'page-ranges',
                                                                       u'print-color-mode',
                                                                       u'print-quality',
                                                                       u'printer-resolution',
                                                                       u'sides'],
                                 'job-hold-until-default': u'no-hold',
                                 'job-hold-until-supported': [u'no-hold',
                                                              u'indefinite',
                                                              u'day-time',
                                                              u'evening',
                                                              u'night',
                                                              u'second-shift',
                                                              u'third-shift',
                                                              u'weekend'],
                                 'job-ids-supported': True,
                                 'job-k-limit': 0,
                                 'job-k-octets-supported': (0, 470914416),
                                 'job-page-limit': 0,
                                 'job-priority-default': 50,
                                 'job-priority-supported': [100],
                                 'job-quota-period': 0,
                                 'job-settable-attributes-supported': [u'copies',
                                                                       u'finishings',
                                                                       u'job-hold-until',
                                                                       u'job-name',
                                                                       u'job-priority',
                                                                       u'media',
                                                                       u'media-col',
                                                                       u'multiple-document-handling',
                                                                       u'number-up',
                                                                       u'output-bin',
                                                                       u'orientation-requested',
                                                                       u'page-ranges',
                                                                       u'print-color-mode',
                                                                       u'print-quality',
                                                                       u'printer-resolution',
                                                                       u'sides'],
                                 'job-sheets-default': (u'none', u'none'),
                                 'job-sheets-supported': [u'none',
                                                          u'classified',
                                                          u'confidential',
                                                          u'form',
                                                          u'secret',
                                                          u'standard',
                                                          u'topsecret',
                                                          u'unclassified'],
                                 'jpeg-k-octets-supported': (0, 470914416),
                                 'jpeg-x-dimension-supported': (0, 65535),
                                 'jpeg-y-dimension-supported': (1, 65535),
                                 'marker-change-time': 0,
                                 'media-bottom-margin-supported': [423],
                                 'media-col-default': u'(unknown IPP value tag 0x34)',
                                 'media-col-supported': [u'media-bottom-margin',
                                                         u'media-left-margin',
                                                         u'media-right-margin',
                                                         u'media-size',
                                                         u'media-source',
                                                         u'media-top-margin',
                                                         u'media-type'],
                                 'media-default': u'iso_a4_210x297mm',
                                 'media-left-margin-supported': [423],
                                 'media-right-margin-supported': [423],