hi,
firts you must turn on the duplex feature in the menu of the printer, if
IFHP is configured correctly you should now get some duplex output by
using lpr -Zduplex -P<printer>. If you are printing a postscript file
which insists on being a 'single-side-file' you will probably not succeed.
If a simple ascii file doesnt't make it to duplex you should put something
in the ifhp.conf section of your printertype. Ususally something like
ps_duplex=
<</Duplex true /Tumble false>> setpagedevice
should be enough.
If fou use model=hp5m this is exactly what is in the printer section...
regards
~christoph
On Mon, 7 Jan 2002, Paul Michael Reilly wrote:
> Still trying to understand how the ifhp filter convinces a suitably
> equipped HP printer (hp-lj5m in my case) to print a postscript
> document on both sides of the paper. Does it prepend some PCL code?
> Ignore it entirely? Modify the .ps temp file to add PostScript to do
> the job?
>
> It's looking more and more like the only way I'll determine the
> correct behavior is to instrument the ifhp source code. Can anyone
> give my suggestions on what routines to pay particular attention to?
>
> Is anyone aware of any ifhp development documentation for newbies who
> want to work on the code?
>
> Thanks,
>
> -pmr
>
>
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