Konica-Minolta 4750en crashed using CUPS 1.52 but not 1.50

[Helge Blischke]

Mark Blades wrote:

>> Mark Blades wrote:
>>
>> >> Mark Blades wrote:
>> >>
>> >> > Hi
>> >> >
>> >> > I just updates my Ubuntu desktop to 12.04 (fresh install rather than
>> >> > upgrade).  ON reinstalling my printers from the cups web interface I
>> >> > found that the 4750en although found and installed by CUPS using the
>> >> > same ppd file (from K-M support site) any job sent to the printer
>> >> > from cups 1.52 hangs the printer (flashing processing light and the
>> >> > printers web
>> >> > interface becomes unreachable).  I have tried installing as a
>> >> > jet/direct
>> >> > or ipp printer to no avail.  Also tried installing via USB with the
>> >> > smae results.
>> >> >
>> >> > I have a laptop with cups 1.50 (on ubuntu 11.10) installed and this
>> >> > prints fine over ethernet using either jet/direct or ipp protocols.
>> >> >
>> >> > I am currently trying to find a way to print to file from the 2 cups
>> >> > versions so that I can compare the PS output for any clues but can't
>> >> > see a way to do that? If the problem is malformed postscript can I
>> >> > send a .pdf to the printer from the shell to bypass the interpreter?
>> >> >
>> >> > any help much appreciated
>> >> >
>> >> > Mark
>> >>
>> >> To save the final data sent to the printer, you may do the following:
>> >> (1) shut down cups
>> >> (2) save the file /etc/cups/printers.conf for safety
>> >> (3) for the printer in question, change the DeviceURI line to
>> >>     DeviceURI file:///absolute_path_to_destination_file
>> >> (4) make the directory where the destination file should be written to
>> >>     world wrietable
>> >> (5) start cups
>> >> (6) make a test print using the same source that caused the problem
>> >> (7) shut down cups
>> >> (8) restore the original DeviceURI for the printer in question in
>> >>     /etc/cups/printers.conf
>> >> (9) start cups
>> >> (10) post (an URL to) the saved sample files.
>> >>
>> >> Note that steps 2,3, and 8 must be done as root (or via sudo command).
>> >>
>> >> Helge
>> >>
>> >>
>> >
>> > Hmm, Thought I posted a reply to you but I'll try again.
>> >
>> > Thanks for the instructions.  The output from cups 1.50, cups 1.52 &
>> > the .odt file used to create the output are at the following url.
>> >
>> > https://sites.google.com/site/kmcupstest/
>> >
>> > thanks in advance
>> >
>> > Mark
>>
>> I modified the cups1-52_fail.txt by decompessing the compressed prologue
>> part of the file, as my suspicion is that the printer's PS interpreter
>> cannot execute LZW (de)compression, as for a long time there was some
>> uncertainty about the LZW decompression (as the compression was covered
>> by a patent until, I think, 2000 or so).
>> Please download the file from this URL:
>>
>> http://www.file-upload.net/download-4322578/cups1-52_t1.ps.html
>>
>> and feed it to your printer as a raw job with the command
>>
>> lp -d your_printer -o raw cups1-52_t1.ps
>>
>> and let me know if it works.
>>
>> Helge
>>
>>
>>
> Hi,
> 
> Feeding the printer the raw file had the same effect as printing from
> office. the printer hangs on processing the file and cups reports the job
> as complete. I also tried using the same command with the 1-50-success
> file and this printed out OK.
> 
> thanks again

And what about the nest test:

http://www.file-upload.net/download-4322677/cups1-52_t2.ps.html

Helge