Bug#879491: cups: printing 3 copies of every page
On Wed, Oct 25, 2017 at 08:08:04PM +0100, Brian Potkin wrote:
> Hello Julian; thank you for your report.
Hello Brian,
Thanks for getting back to me!
> On Sun 22 Oct 2017 at 09:20:28 +0100, Julian Gilbey wrote:
>
> > Package: cups
> > Version: 2.2.5-2
> > Severity: important
> >
> > (I'm labelling this as "important" because it's wasting large amounts
> > of paper.)
> >
> > This is a weird bug, and I have little idea how to track down the
> > cause.
> >
> > About a week or so ago, on my Debian testing system, printing commands
> > started producing three copies of every page on my local printer (so a
> > 2-page document would come out at 3 copies of page 1 followed by 3
> > copies of page 2). This is the case in at least all of the following
> > circumstances:
>
> Can this changed be pinned down to any particular version of cups or
> cups-filters? Or something you altered in cupsd.conf (for example) at
> that time?
The upgrades I've done in October were as follows:
Oct 8:
[UPGRADE] cups-browsed:amd64 1.16.4-1+b2 -> 1.17.8-1
[UPGRADE] cups-filters:amd64 1.16.4-1+b2 -> 1.17.8-1
[UPGRADE] cups-filters-core-drivers:amd64 1.16.4-1+b2 -> 1.17.8-1
[UPGRADE] libcupsfilters-dev:amd64 1.16.4-1+b2 -> 1.17.8-1
[UPGRADE] libcupsfilters1:amd64 1.16.4-1+b2 -> 1.17.8-1
[UPGRADE] libfontembed1:amd64 1.16.4-1+b2 -> 1.17.8-1
Oct 11:
[UPGRADE] cups-browsed:amd64 1.17.8-1 -> 1.17.9-1
[UPGRADE] cups-filters:amd64 1.17.8-1 -> 1.17.9-1
etc. (same packages as above)
Oct 22:
[UPGRADE] cups:amd64 2.2.4-7 -> 2.2.5-2
[UPGRADE] cups-bsd:amd64 2.2.4-7 -> 2.2.5-2
etc., but the problem was already present before this date.
So perhaps it was the Oct 8 or Oct 11 upgrade of cups-filters?
I downgraded back to 1.16.4-1+b2, and then it worked fine. I
upgraded to 1.17.9-1 (dist-upgrade through aptitude) and immediately
downgraded to 1.17.8-1, and it still worked, and then I upgraded back
to 1.17.9-1, and it still works.
So now everything is working again, and I have no obvious way now of
reproducing the problem.
How weird.
> > SELF Test Page only produces a single page of output!
>
> A self-test page is actually produced by the printer itself; it is often
> done from a button on the printer. The filtering system is not involved.
Ah, OK.
> Did you really use port 603 to bring up the CUPS web interface?
Duh, no, 631, sorry.
> You also mention Windows and Mac machines. I am not familiar with
> printing from either of these, but my understanding is that Windows does
> all the processing and sends the completed job to a CUPS server, which
> does no processing. That is, the filtering system is bypassed. I wonder
> whether your Mac is doing this too.
Yes, I should have been more precise: they print directly to the
printer over ethernet, not via CUPS. This showed me that the problem
lay in the CUPS system, not in the printer itself.
> > [...]
> > Any suggestions?
>
> We'll need the printer model, the PPD used and an error_log.
So in the meantime, for the sake of information, it's a Brother
DCP-9020CDW. But there's no point in sending logs, etc., because it's
now working again....
So I guess either close this bug report or mark it as unreproducible?
Best wishes,
Julian
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