Non sono riuscito ad allegare il file di log (mi dice che non posso caricare più di 20 kB, ma non sono pochini?), vi riporto la prima parte:

Page 1 (<troubleshoot.SchedulerNotRunning.SchedulerNotRun ning object at 0x7fc0f62a5240>):
{'cups_connection_failure': False}
Page 2 (<troubleshoot.CheckLocalServerPublishing.CheckLoc alServerPublishing object at 0x7fc0f62a5908>):
{'local_server_exporting_printers': False}
Page 3 (<troubleshoot.ChoosePrinter.ChoosePrinter object at 0x7fc0f62a51d0>):
{'cups_dest': <cups.Dest Canon-MG3000-series (default)>,
'cups_instance': None,
'cups_queue': 'Canon-MG3000-series',
'cups_queue_listed': True}
Page 4 (<troubleshoot.CheckPrinterSanity.CheckPrinterSani ty object at 0x7fc0f62a56a0>):
{'cups_device_uri_scheme': 'usb',
'cups_printer_dict': {'device-uri': 'usb://Canon/MG3000%20series?serial=557580&interface=1',
'printer-info': 'Canon MG3000 series',
'printer-is-shared': True,
'printer-location': 'ale-desktop',
'printer-make-and-model': 'Canon PIXMA MG3100 - '
'CUPS+Gutenprint v5.2.11',
'printer-state': 3,
'printer-state-message': '',
'printer-state-reasons': ['none'],
'printer-type': 167964,
'printer-uri-supported': 'ipp://localhost/printers/Canon-MG3000-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': True,
'compression-supported': ['none', 'gzip'],
'copies-default': 1,
'copies-supported': (1, 9999),
'cups-version': '2.1.3',
'device-uri': 'usb://Canon/MG3000%20series?serial=557580&interface=1',
'document-format-default': 'application/octet-stream',
'document-format-supported': ['application/octet-stream',
'application/pdf'