Avevo letto che la nuova versione 18.04 ha "il supporto delle stampanti senza l'utilizzo di driver", invece ricevo un messaggio di errore quando lancio la stampa sia sulla Samsung Laser SCX-3405 che sulla HP PSC1510,che funzionano perfettamente con un altro portatile dotato della 16.04 e anche in Windows; questo messaggio è la risposta alla richiesta di diagnosi dell'errore con il "Printing Troubleshooter" (rintracciabile sulla schermatina "stato di stampa dei documenti"):
«Inattiva - SpliX Error while rendering the request. Check the previous message»
Al passo diagnostico successivo ho dato con il terminale il comando suggerito, avendo come risposta:
«Failed to parse timestamp: None»
Passo seguente: sempre dalla schermatina del "Printing Troubleshooter" ottengo questo lungo reporting:
Codice: Seleziona tutto
Page 1 (<troubleshoot.SchedulerNotRunning.SchedulerNotRunning object at 0x7fe771e28908>):
{'cups_connection_failure': False}
Page 2 (<troubleshoot.ChoosePrinter.ChoosePrinter object at 0x7fe771e28eb8>):
{'cups_dest': <cups.Dest Samsung-SCX-3400-Series (default)>,
'cups_instance': None,
'cups_queue': 'Samsung-SCX-3400-Series',
'cups_queue_listed': True}
Page 3 (<troubleshoot.CheckPrinterSanity.CheckPrinterSanity object at 0x7fe771e28ef0>):
{'cups_device_uri_scheme': 'usb',
'cups_printer_dict': {'device-uri': 'usb://Samsung/SCX-3400%20Series?serial=PBA_i-DPT_USBNo0&interface=1',
'printer-info': 'Samsung SCX-3400 Series',
'printer-is-shared': True,
'printer-location': 'boss-Pavilion-ZV6100-EE984EA-ABZ',
'printer-make-and-model': 'Samsung SCX-3200, 2.0.0',
'printer-state': 3,
'printer-state-message': 'SpliX Error while rendering '
'the request. Check the '
'previous message',
'printer-state-reasons': ['none'],
'printer-type': 143428,
'printer-uri-supported': 'ipp://localhost/printers/Samsung-SCX-3400-Series'},
'cups_printer_remote': False,
'is_cups_class': False,
'local_cups_queue_attributes': {'charset-configured': 'utf-8',
'charset-supported': ['us-ascii', 'utf-8'],
'color-supported': False,
'compression-supported': ['none', 'gzip'],
'copies-default': 1,
'copies-supported': (1, 9999),
'cups-version': '2.2.7',
'device-uri': 'usb://Samsung/SCX-3400%20Series?serial=PBA_i-DPT_USBNo0&interface=1',
'document-format-default': 'application/octet-stream',
'document-format-supported': ['application/octet-stream',
'application/pdf',
'application/postscript',
'application/vnd.adobe-reader-postscript',
'application/vnd.cups-pdf',
'application/vnd.cups-pdf-banner',
'application/vnd.cups-postscript',
'application/vnd.cups-raster',
'application/vnd.cups-raw',
'application/vnd.samsung-ps',
'application/x-cshell',
'application/x-csource',
'application/x-perl',
'application/x-shell',
'image/gif',
'image/jpeg',
'image/png',
'image/pwg-raster',
'image/tiff',
'image/urf',
'image/x-bitmap',
'image/x-photocd',
'image/x-portable-anymap',
'image/x-portable-bitmap',
'image/x-portable-graymap',
'image/x-portable-pixmap',
'image/x-sgi-rgb',
'image/x-sun-raster',
'image/x-xbitmap',
'image/x-xpixmap',
'image/x-xwindowdump',
'text/css',
'text/html',
'text/plain'],
'finishings-default': 3,
'finishings-supported': [3],
'fitplot-default': False,
'generated-natural-language-supported': ['it-it'],
'ipp-features-supported': ['subscription-object'],
'ipp-versions-supported': ['1.0',
'1.1',
'2.0',
'2.1'],
'ippget-event-life': 15,
'job-cancel-after-default': 10800,
'job-cancel-after-supported': (0, 2147483647),
'job-creation-attributes-supported': ['copies',
'finishings',
'ipp-attribute-fidelity',
'job-hold-until',
'job-name',
'job-priority',
'job-sheets',
'media',
'media-col',
'multiple-document-handling',
'number-up',
'output-bin',
'orientation-requested',
'page-ranges',
'print-color-mode',
'print-quality',
'printer-resolution',
'sides'],
'job-hold-until-default': 'no-hold',
'job-hold-until-supported': ['no-hold',
'indefinite',
'day-time',
'evening',
'night',
'second-shift',
'third-shift',
'weekend'],
'job-ids-supported': True,
'job-k-limit': 0,
'job-k-octets-supported': (0, 23127628),
'job-page-limit': 0,
'job-priority-default': 50,
'job-priority-supported': [100],
'job-quota-period': 0,
'job-settable-attributes-supported': ['copies',
'finishings',
'job-hold-until',
'job-name',
'job-priority',
'media',
'media-col',
'multiple-document-handling',
'number-up',
'output-bin',
'orientation-requested',
'page-ranges',
'print-color-mode',
'print-quality',
'printer-resolution',
'sides'],
'job-sheets-default': ('none', 'none'),
'job-sheets-supported': ['none',
'classified',
'confidential',
'form',
'secret',
'standard',
'topsecret',
'unclassified'],
'jpeg-k-octets-supported': (0, 23127628),
'jpeg-x-dimension-supported': (0, 65535),
'jpeg-y-dimension-supported': (1, 65535),
'marker-change-time': 0,
'media-bottom-margin-supported': [529],
'media-col-default': '(unknown IPP value tag '
'0x34)',
'media-col-supported': ['media-bottom-margin',
'media-left-margin',
'media-right-margin',
'media-size',
'media-source',
'media-top-margin',
'media-type'],
'media-default': 'iso_a4_210x297mm',
'media-left-margin-supported': [379],
'media-right-margin-supported': [379],
'media-size-supported': ['(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)',
'(unknown IPP value '
'tag 0x34)'],
'media-source-supported': ['auto', 'manual'],
'media-supported': ['na_letter_8.5x11in',
'na_legal_8.5x14in',
'iso_a4_210x297mm',
'na_executive_7.25x10.5in',
'oe_ledger_17x11in',
'iso_a3_297x420mm',
'na_number-10_4.125x9.5in',
'om_monarch_98.43x190.5mm',
'om_c-5_161.93x228.95mm',
'om_dl_110.07x220.13mm',
'jis_b4_257x364mm',
'jis_b5_182x257mm',
'om_env-isob-5_176.04x250.12mm',
'jpn_hagaki_100x148mm',
'jpn_oufuku_148x200mm',
'iso_a5_148x210mm',
'iso_a6_105x148mm',
'jis_b6_128x182mm',
'om_c-6_113.95x161.93mm',
'om_folio_210x330mm',
'na_personal_3.625x6.5in',
'na_number-9_3.875x8.875in',
'na_oficio_8.5x13.4in'],
'media-top-margin-supported': [529],
'media-type-supported': ['off',
'normal',
'thick',
'thin',
'bond',
'ohp',
'cardstock',
'label',
'used',
'color',
'envelope',
'cotton',
'stationery-recycled',
'archive'],
'multiple-document-handling-supported': ['separate-documents-uncollated-copies',
'separate-documents-collated-copies'],
'multiple-document-jobs-supported': True,
'multiple-operation-time-out': 300,
'multiple-operation-time-out-action': 'process-job',
'natural-language-configured': 'it-it',
'notify-attributes-supported': ['printer-state-change-time',
'notify-lease-expiration-time',
'notify-subscriber-user-name'],
'notify-events-default': ['job-completed'],
'notify-events-supported': ['job-completed',
'job-config-changed',
'job-created',
'job-progress',
'job-state-changed',
'job-stopped',
'printer-added',
'printer-changed',
'printer-config-changed',
'printer-deleted',
'printer-finishings-changed',
'printer-media-changed',
'printer-modified',
'printer-restarted',
'printer-shutdown',
'printer-state-changed',
'printer-stopped',
'server-audit',
'server-restarted',
'server-started',
'server-stopped'],
'notify-lease-duration-default': 86400,
'notify-lease-duration-supported': (0,
2147483647),
'notify-max-events-supported': [100],
'notify-pull-method-supported': ['ippget'],
'notify-schemes-supported': ['dbus',
'mailto',
'rss'],
'number-up-default': 1,
'number-up-supported': [1, 2, 4, 6, 9, 16],
'operations-supported': [2,
4,
5,
6,
8,
9,
10,
11,
12,
13,
16,
17,
18,
19,
20,
21,
22,
23,
24,
25,
26,
27,
28,
34,
35,
37,
38,
56,
57,
59,
16385,
16386,
16387,
16388,
16389,
16390,
16391,
16392,
16393,
16394,
16395,
16396,
16397,
16398,
16399,
16423,
14],
'orientation-requested-default': 3,
'orientation-requested-supported': [3,
4,
5,
6],
'output-bin-default': 'face-down',
'output-bin-supported': ['face-down'],
'page-ranges-supported': True,
'pages-per-minute': 1,
'pdf-k-octets-supported': (0, 23127628),
'pdf-versions-supported': ['adobe-1.2',
'adobe-1.3',
'adobe-1.4',
'adobe-1.5',
'adobe-1.6',
'adobe-1.7',
'iso-19005-1_2005',
'iso-32000-1_2008',
'pwg-5102.3'],
'pdl-override-supported': ['attempted'],
'port-monitor': 'none',
'port-monitor-supported': ['none'],
'prettyprint-default': False,
'print-color-mode-default': 'monochrome',
'print-color-mode-supported': ['monochrome'],
'print-quality-default': 3,
'print-quality-supported': [4],
'printer-commands': 'none',
'printer-config-change-date-time': '(IPP_TAG_DATE)',
'printer-config-change-time': 1538989924,
'printer-current-time': '(IPP_TAG_DATE)',
'printer-dns-sd-name': 'Samsung SCX-3400 '
'Series @ '
'boss-Pavilion-ZV6100-EE984EA-ABZ',
'printer-error-policy': 'abort-job',
'printer-error-policy-supported': ['abort-job',
'retry-current-job',
'retry-job',
'stop-printer'],
'printer-geo-location': '(unknown IPP value '
'tag 0x12)',
'printer-get-attributes-supported': ['document-format'],
'printer-icons': 'http://localhost/icons/Samsung-SCX-3400-Series.png',
'printer-info': 'Samsung SCX-3400 Series',
'printer-is-accepting-jobs': True,
'printer-is-shared': True,
'printer-is-temporary': False,
'printer-location': 'boss-Pavilion-ZV6100-EE984EA-ABZ',
'printer-make-and-model': 'Samsung SCX-3200, '
'2.0.0',
'printer-more-info': 'http://localhost/printers/Samsung-SCX-3400-Series',
'printer-name': 'Samsung-SCX-3400-Series',
'printer-op-policy': 'default',
'printer-op-policy-supported': ['authenticated',
'default'],
'printer-organization': '',
'printer-organizational-unit': '',
'printer-resolution-default': (600, 600, 3),
'printer-resolution-supported': [(600, 600, 3),
(1200,
1200,
3)],
'printer-settable-attributes-supported': ['printer-geo-location',
'printer-info',
'printer-location',
'printer-organization',
'printer-organizational-unit'],
'printer-state': 3,
'printer-state-change-date-time': '(IPP_TAG_DATE)',
'printer-state-change-time': 1539425063,
'printer-state-message': 'SpliX Error while '
'rendering the '
'request. Check the '
'previous message',
'printer-state-reasons': ['none'],
'printer-type': 143428,
'printer-up-time': 1539425095,
'printer-uri-supported': ['ipp://localhost/printers/Samsung-SCX-3400-Series'],
'printer-uuid': 'urn:uuid:15d49221-6105-3b87-594e-774d97332487',
'pwg-raster-document-resolution-supported': [(600,
600,
3)],
'pwg-raster-document-sheet-back': 'normal',
'pwg-raster-document-type-supported': ['black_1',
'sgray_8'],
'queued-job-count': 1,
'server-is-sharing-printers': True,
'sides-default': 'one-sided',
'sides-supported': ['one-sided'],
'uri-authentication-supported': ['requesting-user-name'],
'uri-security-supported': ['none'],
'which-jobs-supported': ['completed',
'not-completed',
'aborted',
'all',
'canceled',
'pending',
'pending-held',
'processing',
'processing-stopped']}}
Page 4 (<troubleshoot.CheckPPDSanity.CheckPPDSanity object at 0x7fe7703d3438>):
{'cups_printer_ppd_defaults': {'General': {'Altitude': 'LOW',
'ColorModel': 'Gray',
'EconoMode': 'ON',
'InputSlot': 'Auto',
'JamRecovery': 'False',
'MediaType': 'THICK',
'PageRegion': 'A4',
'PageSize': 'A4',
'PowerSave': '5',
'Resolution': '600dpi',
'TonerDensity': '1'}},
'cups_printer_ppd_valid': True,
'missing_pkgs_and_exes': ([], [])}
Page 5 (<troubleshoot.LocalOrRemote.LocalOrRemote object at 0x7fe7703d3be0>):
{'printer_is_remote': False}
Page 6 (<troubleshoot.PrinterStateReasons.PrinterStateReasons object at 0x7fe7703f28d0>):
{'printer-state-message': 'SpliX Error while rendering the request. Check the '
'previous message',
'printer-state-reasons': ['none']}
Page 7 (<troubleshoot.Locale.Locale object at 0x7fe77014b320>):
{'printer_page_size': 'A4',
'system_locale_lang': None,
'user_locale_ctype': 'it_IT',
'user_locale_messages': 'it_IT'}Ho visto, dal Gestore Pacchetti, che tutto ciò che riguarda CUPS e simili è stato rivoluzionato rispetto alla precedente 16.04 e non so proprio cosa fare.
Le discussioni aperte sul problema non mi sono state di aiuto. Chiedo lumi agli esperti, grazie.
Il Giudizio sarà inappellabile 
. Saluti da Vincent
Salve, e come potrebbe avere "il supporto delle stampanti senza l'utilizzo di driver" ? Esistono un numero imprecisabile di stampanti, scanner e multifunzione, non è pensabile di preinstallare tutti i driver, neppure su Window funziona, eufemismo, così.
Ciao
Pare anche a me che la versione 18.04 non sia brillante: oltre al problema stampanti mi pare che occupi più spazio ed è più lenta della 16. 
. Ne riparleremo quando avrò tempo e coraggio per ricaricare quest'ultima; grazie a tutti per l'interessamento