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I have a Pixma iP 4500 just stopped printing, it's just processing the page stops at 1,24%. Being a total noob, here is part troubleshoot output (I couldn't paste the whole file), please let me know if you need some additional data and how/where should I find them so I can post them (thanks):

{'cups_connection_failure': False}
Page 2 (Choose printer):
{'cups_dest': <cups.Dest Canon-iP4500-series (default)>,
 'cups_instance': None,
 'cups_queue': 'Canon-iP4500-series',
 'cups_queue_listed': True}
Page 3 (Check printer sanity):
{'cups_device_uri_scheme': u'usb',
 'cups_printer_dict': {'device-uri': u'usb://Canon/iP4500%20series?serial=323BCC',
                       'printer-info': u'Canon iP4500 series',
                       'printer-is-shared': False,
                       'printer-location': u'maja-PC',
                       'printer-make-and-model': u'Canon PIXMA iP4500 - CUPS+Gutenprint v5.2.7 Simplified',
                       'printer-state': 4,
                       'printer-state-message': u'Printing page 1, 14%',
                       'printer-state-reasons': [u'none'],
                       'printer-type': 2273308,
                       'printer-uri-supported': u'ipp://localhost:631/printers/Canon-iP4500-series'},
 'cups_printer_remote': False,
 'is_cups_class': False,
 'local_cups_queue_attributes': {'auth-info-required': u'none',
                                 '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'1.5.0',
                                 'device-uri': u'usb://Canon/iP4500%20series?serial=323BCC',
                                 'document-format-default': u'application/octet-stream',
                                 'document-format-supported': [u'application/octet-stream',
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1 Answer

You could try this two answers:

First one I would try is this: http://superuser.com/a/155950/221323

According to CUPS documentation, the standard config places cache files in /var/spool/cups/cache and print jobs in /var/spool/cups. I'd imagine the best strategy is either of the following:

  1. Clear it with specific CUPS commands. Unfortunately there's not a builtin command to clear the cache; only enabling/disabling specific print queues and removing specific print jobs seem to be available.

    Use lpq (to view the queues), lprm, and cancel, or the web interface, to view current jobs and remove them. cancel -a should cancel all jobs on all queues.

    If your system is hosed by defined printers and queues, deleting those objects may help. Use lpadmin or the web interface to manage defined printers.

  2. Clear it manually, by:
    1. stopping CUPS (eg, sudo service cups stop),
    2. removing files manually, and
    3. restarting CUPS (eg, sudo service cups start).

This long thread suggests that /var/spool/cups contains completed print jobs while /var/spool/cups/tmp contains in-progress jobs. One post to that thread suggests running sudo rm -r /var/spool/cups in step 2.2 above. Steps 2.1 and 2.3 show Ubuntu commands for stopping and starting services; other OS's will vary.

If you really need to delete cache files in /var/cache/cups, you will probably need to use the manual method.

And the second one is this: http://askubuntu.com/a/303604/153260

Well, I posted it as a comment, but I will post it as a answer.

Maybe deleting the printer will reset the stack and solve the error.

My computer system is in Spanish, but the icons are very clear to do the steps

  1. Go to System Configuration -> Printers enter image description here
  2. Delete the printer that is having the error enter image description here
  3. Unplug the printer an plug it again to configure it as a new printer
  4. Try to print
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/var/spool/cups/tmp was empty, but when trying to open the folder I have no permission to open it. Deleting the printer didn't do the job either :( –  Maja Jun 11 '13 at 22:00
/var/spool/cups/tmp was empty; I suppose permissions have no difference here :) –  Maja Jun 11 '13 at 22:07
And did you try the second option? –  Leo Jun 11 '13 at 22:52
yes, it didn't help. He is still processing the test page, doesn't print anything. Too bad I can not post the whole troubleshoot file. Maybe something can be seen there... –  Maja Jun 14 '13 at 21:12
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