[cups] Difficulties with printing music score .pdfs
Helge Blischke
HelgeBlischke at web.de
Tue Sep 1 10:18:37 PDT 2015
Yes, I meant cupsctl —debug-logging, of course.
Well, I really need the log entries that look like
D [01/Sep/2015:18:37:59 +0200] [Job 210] Request file type is application/pdf.
(example from my error_log) in order to know which filters are called for this job.
What I found when looking into the PDF is:
The whole PDF contents is one single image, black and white (1 bit per component), and
the black pixels are encoded as „1“.
I suspect that this is preserved in the PostScript stream to PDF is converted to, and the
proprietary Canon filter misinterprets this.
Helge
> Am 01.09.2015 um 17:40 schrieb Alan McConnell <alan at his.com <mailto:alan at his.com>>:
>
> I am cc-ing Herr Miexner, since he is an expert and was so kind as
> to also take an interest.
>
> On Tue, Sep 01, 2015 at 04:47:39PM +0200, Helge Blischke wrote:
>> Alan, I recently was able to solve a similar problem with a Canon printer.
>> Please send me
>> a) the PDF which exhibits the issue to ???helgeblischke at web dot de???,
>> (as the list strips off attachments),
>> b) an excerpt of the cups error_log containing the messages regarding to the job
>> (see below).
>>
>> Helge
>>
>> PS: to get the relevant messages, you may follow these steps:
>> 1) execute cupsctl ???error-logging
> I trust that you meant: cupsctl --debug-logging.
> "cupsctl --error-logging" returns an error message.
>
>> 2) print the test file
> Just as ugly as before. The troublesome .pdf is Attached.
>
>> 3) execute grep 'Job xxx??? /var/log/cups/error_log > some_temp_file
>> (where xxx is the job ID of the test job).
> This is weird! For the lp command reported that the
> job being executed was 140, Just below is the contents
> of /var/log/cups/error_log:
> (start)--------------------------
> ***************************************
> D [01/Sep/2015:11:23:27 -0400] Report: clients=0
> D [01/Sep/2015:11:23:27 -0400] Report: jobs=103
> D [01/Sep/2015:11:23:27 -0400] Report: jobs-active=0
> D [01/Sep/2015:11:23:27 -0400] Report: printers=1
> D [01/Sep/2015:11:23:27 -0400] Report: printers-implicit=0
> D [01/Sep/2015:11:23:27 -0400] Report: stringpool-string-count=1902
> D [01/Sep/2015:11:23:27 -0400] Report: stringpool-alloc-bytes=8776
> D [01/Sep/2015:11:23:27 -0400] Report: stringpool-total-bytes=31704
>
> ------------------------(finish)
> I hope that this is what you wanted. I hope I need not
> say that I am very grateful to you and Johannes for
> taking an interest!
>
> Alan
>
> --
> Alan McConnell : http://globaltap.com/~alan/ <http://globaltap.com/~alan/>
> Memory says, "I did that." Pride replies, "I could not have
> done that." Eventually, Memory yields.(Friederich Nietzsche)
> <beeth-1symph-p1.pdf>
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