Canon MG5520 wireless printer

[Tim Waugh]

On Sat, 2014-10-11 at 21:26 -0400, Kevin Cummings wrote:
> I opened the Network Printer expansion,
> but the printer I was looking for was not present, so I decided to enter
> it manually.  While I was trying to figure out how to do that, an entry
> for the printer "magically" appeared in the network list!  I guess it
> took a little time to "find" it.

There would have been a "spinner" in the status bar at the bottom,
similar to how Evolution shows that it's busy with a task. The delay is
due to asking CUPS to report all devices discovered by the backends that
deal with network printing, and it takes a while for them all to report
back.

> It came up with the
> bjnp://ip-address/:8611 URL.  When I selected it, it took a few minutes
> to "find and install" the proper print driver, and not long after that,
> I had printed a test page.  < 10 minutes!

This delay is largely disk-bound: CUPS has to read all the PPDs and run
the dynamic drivers (foomatic and gutenprint).

> Great job.  It would have been nice if this could have all been done
> automatically with CUPS finding all the right drivers automatically (ie,
> not having to install the cups-bjnp and cnijfilter-mg5500series RPMs
> myself), but, otherwise, a grand job of easing the installation!

If I understand correctly, cups-bjnp is the backend that discovers the
printer. So there's no way to know in advance that it needs to be
installed; it would have to be installed by default.

Tim.
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