cups (1.5.3-0ubuntu2) precise-proposed; urgency=low
* debian/patches/usb-backend-further-enhancements.patch: Added latest
development work on the libusb-based USB backend:
- Support for uni-directional devices, both protocol-1 devices and
devices where no read endpoint is found (LP: #1000253, LP: #1001028).
- Soft reset specific to the "PRINTER" device class. This allows a
reset without reconnecting.
- When closing the device, it will also get reset to its original
configuration, before re-attaching the usblp kernel module. Do not
restore the configuration setting when the old configuration was zero,
as zero means "unconfigured".
- Added option "usb-unidir" to force the backend into uni-directional
mode. This allows to work around problems with bi-di communications,
especially also a delay at the end of the job caused by closing the
read channel (happens only for some devices, LP: #1001028). Also
useful for debugging.
- Added the quirk management of the usblp kernel module. So the problems
of all printers which were worked around in the kernel module are
also worked around in the libusb-based CUPS backend now (LP: #1000253).
- Added new quirk type to quirk manager: Printers for which the usblp
kernel module should not get reattached after printing a job
- Added additional quirks for the Prolific Technology USB -> Parallel
adapter, as the adapter needs uni-directional mode to be forced and
also does not like re-attaching the usblp kernel module after the
job (last third of last page gets cut off, re-attaching probably
sends a reset to the printer while there is still data to be printed
in the printer's internal buffer, LP: #987485).
- Added the command line option "usb-no-reattach". With the option set
the usblp kernel module does not get reattached after a job has been
printed. Some printers cut off the end of the job or even crash by
re-attaching the module. This is a development/debug mode to test
whether re-attaching was the culprit of a problem. Users should
report such issues so that their printers can get added to the quirk
- Do a printer reset after each job, this makes the Prolific USB ->
Parallel adapter finally work (LP: #987485) and makes it unnecessary
to blacklist the usblp kernel module for some printers (LP: #997040).
- Some extra debug messages.
- Added a missing libusb_free_config_descriptor().
This patch is submitted upstream as CUPS STR #4128.
* debian/patches/add-ipp-backend-of-cups-1.4.patch, debian/cups.config,
debian/cups.lintian-overrides, debian/cups.postinst, debian/cups.prerm,
debian/cups.templates: Add the IPP backend of CUPS 1.4.x to the current
CUPS package as independent backend "ipp14". Some devices (like the
LiveBox 2 and some Samsung printers) do not work with the current IPP
backend (LP: #945028, LP: #973270).
* debian/local/blacklist-cups-usblp.conf, debian/cups.postinst,
debian/cups.install, debian/cups.preinst, debian/cups.postinst,
debian/cups.postrm: As we have vastly improved the USB backend, we
lift the blacklisting again as it is not needed any more. This way
users with proprietary third-party backends based on /dev/usb/lp*
device files can print again. The problems which we have worked around
with the first SRU for Precise are now actually fixed in the USB
backend (LP: 997040, LP: #1000253).
-- Till Kamppeter <email address hidden> Tue, 10 Jul 2012 23:09:01 +0200