This bug was fixed in the package cups - 1.7.5-3
---
cups (1.7.5-3) unstable; urgency=medium
[ Didier Raboud ]
* Add two USB quirk fixes for Canon MX310 and MX320 printers
(LP: #1346868, #1369547)
[ Jamie Strandboge ]
* Update the apparmor-profile
- move Ux to Cx -
Isn't this really a workaround, rather than a proper fix? Presumably
when bi-directional comms are used there is useful info being returned
by the printer, so now that it's prevented that will cause the printer
to run slower or other problems will be ignored?
Will this be taken up with Canon's
** Changed in: cups (Ubuntu)
Status: Confirmed = Triaged
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https://bugs.launchpad.net/bugs/1346868
Title:
Canon MX310 printer hangs when printing
** Tags removed: apparmor
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https://bugs.launchpad.net/bugs/1346868
Title:
Canon MX310 printer hangs when printing LibreOffice Writer doc
Status in “cups”
Reported to CUPS upstream as https://www.cups.org/str.php?L4482
** Changed in: cups (Ubuntu)
Status: Incomplete = Confirmed
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lpadmin -p MX310-series -o usb-unidir-default=true seems to fix the
problem. Removing that (-R) and using instead lpadmin -p MX310-series
-o usb-no-reattach-default=true the symptoms are as before.
Does this help? Are there further tests I can run?
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I have the MX310 printer on loan again for a short time. I suspected
that the behaviour, with the printer hanging up and requiring the power
plug to be pulled to recover, while Ubuntu was fine, is perhaps due to a
firmware error. After all, no matter what one throws at the printer, it
shouldn't
Example LO document used in above test.
** Attachment added: prints-but-hangs-printer.odt
https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1346868/+attachment/4159903/+files/prints-but-hangs-printer.odt
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lsusb:
Bus 001 Device 007: ID 04a9:1728 Canon, Inc. MX310 ser
$ ls -l /dev/usb/lp* /dev/bus/usb/*/*
crw-rw-r-- 1 root root 189, 0 Jul 21 19:49 /dev/bus/usb/001/001
crw-rw-r--+ 1 root lp 189, 6 Jul 21 19:49 /dev/bus/usb/001/007
crw-rw-r-- 1 root root 189, 128 Jul 21 19:49
Please follow the instructions of the section USB printer does not
print or prints garbage on
https://wiki.ubuntu.com/DebuggingPrintingProblems. Thanks.
** Changed in: cups (Ubuntu)
Status: New = Incomplete
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Thanks for quick response. I did follow as much of that as seemed
relevant to me. Can you be more specific?
By the way, I had difficulty following the instructions to turn on the
error log. The gear icon in 14.04 has no 'Printer' in its menu (and
12.04 has 'Printers', not 'Printer'). Though
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