Hi! I've had the same problem with duplex not working when printing Postscript generated/modified by psutils. I'm not sure if it's a bug in psutils or cupsys. If you think it's a bug in psutils please forward my message or reassign this bug.
The bug can be fixed either in Cups or in psutils. Psutils disables the
command /setpagedevice. But cups inserts the commands to disable
duplex-printing _after_ the command has been disabled. Obviously either
duplex-printing and other options have to be enabled earlier or the
command must be disabled later.
You can try the following patch (to psutils) which does the latter. It
works for me and I didn't notice any ill side effects.
--- ../../psunu/psutils-1.17/psspec.c 1997-03-11 23:53:04.000000000 +0100
+++ psspec.c 2006-04-22 18:02:32.000000000 +0200
@@ -109,8 +109,6 @@
" /monarchenvelope/c5envelope/dlenvelope/lettersmall/note", /* paper */
" /folio/quarto/a5]{dup where{dup wcheck{exch{}put}", /* operators */
" {pop{}def}ifelse}{pop}ifelse}forall",
- "/setpagedevice {pop}bind 1 index where{dup wcheck{3 1 roll put}",
- " {pop def}ifelse}{def}ifelse",
"/PStoPSmatrix matrix currentmatrix def",
"/PStoPSxform matrix def/PStoPSclip{clippath}def",
"/defaultmatrix{PStoPSmatrix exch PStoPSxform exch concatmatrix}bind def",
@@ -166,6 +164,8 @@
writestring("userdict/PStoPSxform PStoPSmatrix matrix currentmatrix\n");
writestring(" matrix invertmatrix matrix concatmatrix\n");
writestring(" matrix invertmatrix put\n");
+ writestring("/setpagedevice {pop}bind 1 index where{dup wcheck{3 1 roll
put}\n");
+ writestring(" {pop def}ifelse}{def}ifelse\n");
}
writesetup();
for (thispg = 0; thispg < maxpage; thispg += modulo) {
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