Duplex problem

[Helge Blischke]

stelmo at savba.sk wrote:
> 
> Helge Blischke wrote:
> > stelmo at savba.sk wrote:
> > >
> > > Anonymous wrote:
> > > > Helge Blischke wrote:
> > > > > stelmo at savba.sk wrote:
> > > > > >
> > > > > > This is a summary of what I have found out so far
> > > > > >
> > > > > > 1) The duplex is ok for text and other format files
> > > > > > so it seems that the problem is with the ps files only
> > > > > >
> > > > > > 2) with a file produced with dvips (from a dvi file) I get no duplex
> > > > > > with the same file after I had run ps2ps I get one blank page
> > > > > >
> > > > > > 3) if I replace pstops filter of cups 1.1.20 with the filter from
> > > > > > the 1.1.14 release I get duplex right.
> > > > > >
> > > > > > I run debian sarge, cups version 1.1.20, printer is xerox phaser 6250dp and I use win's ppd.
> > > > >
> > > > >
> > > > > Post (an URL to) a sample file. Whithout knowing the details, it is
> > > > > virtually impossible to give any advice.
> > >
> > > the test files can be found at
> > >
> > > www.quniverse.sk/stelmo/cups
> > >
> > > this first file was generated usig latex and then dvips while the second
> > > ps file was dowloaded from the internet.
> > >
> > > Peter
> >
> > Well, both files print duplex if requested from the command line (-o
> > sides=two-sided-long-edge)
> > at least with my installateion (CUPS 1.1.19 and the alternate pstops
> > filter). But it may be
> > that the 1.1.20 pstops filter is more regirous with respect to DSC
> > comnpliance.
> > Both files lack the "%%BeginProlog" comment line which may screw up
> > things belonging into the
> > prolog or setup section, respectively.
> >
> > Perhaps you could contact the radical eyes people to make dvips really
> > DSC compliant (it should
> > be not too difficult, believe me).
> >
> > Helge
> >
> > --
> > H.Blischke at srz-berlin.de
> > H.Blischke at srz-berlin.com
> > H.Blischke at acm.org
> 
> In addition I have tried the following:
> I downloaded fresh cupsys-1.1.20 source package from debian mirror and I have replaced the source file pstops.c with an older pstops.c
> from the 1.1.14 version of cupsys and compile the whole thing (cupsys).
> In this case (the binary files pstops differ, cupsys 1.1.20 vs. 1.1.14 but the same source file pstops.c)  I get duplex right.
> So it seems to me that the problem lies in the filter pstops indeed (I just wanted to be sure and see clearly what you see right away)
> 
Please, post or send me the PPD for the printer you have trouble with. I
just looked at
the latest three versions of pstops.c (the ones distributed with 1.1.19,
1.1.20, and
the CVS one) and didn't find anything that could disturb the duplex
printing.
As I don't know which source version of this filter was in 1.1.14, I
have no idea -
perhaps you could send me a diff.

As for the PPD, if that contains a JobPatchFile statement, in case of a
missing 
%%BeginProlog statement the job patch file stuff may be emitted _after_
the setup stuff
(the defaults you configured for the printer).

Helge


-- 
H.Blischke at srz-berlin.de
H.Blischke at srz-berlin.com
H.Blischke at acm.org