>>>>> "Sam" == Sam MacDonald <smac at visi.com> writes:

    Sam> Rendering is memory intense, postscript going to a non-postscript 
    Sam> printer will drive you nuts sometimes.  Laser printers will go insane 
    Sam> when they don't have enough memory to process a job. Some times they 
    Sam> spit paper out with just one line or many lines of garbage or they just 
    Sam> hang.

    Sam> But this sounded like a spooler stalling, because it was fixed by 
    Sam> restarting the spooler (cups).

    Sam> If the print job is coming from a windoze machine.
    Sam> Be sure the output is set to "Raw" this may not eliminate all stalling 
    Sam> but it should help.
    Sam> Turn off the printing of any extra pages that divide print jobs.
    Sam> Delete any temporary files " *.tmp " in the "Temp" directory 
    Sam> (c:\windows\temp or c:\temp). 
    Sam> Don't use the wonderful drag and drop feature on a windows machine to 
    Sam> print, sometimes the application hangs the print job after several pages.
    Sam> Extend the time-out of the print spooler is another option.
    Sam> Turn the printer off and on once in a while, nothing like a
    Sam> cold boot.

Thanks, the above are useful.  But note that this is NOT just printing
from Windoze.  In fact, most of the problems occur printing from
Linux.

I don't understand about the time-out issue.  If the time-out were too
short, wouldn't I get the jobs failing?  That's not what's happening
--- the jobs just stop progressing....

Is there any way to tell if the problem's on the spooler side or on
the printer side?

BTW, I have looked at the WWW CUPS admin tool, and it's totally
user-friendly.  I.e., it doesn't export any useful information.  Seems
only to let me choose a driver and specify printer type.  Munir seemed
to be pointing at something with more functionality....

R

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