On Mon, 23 Aug 2004 14:00:08 -0700 Phillip Stark <[EMAIL PROTECTED]> wrote:
> As many of you know, the HP Laserjet 4200 (and most of HP's current > printers) has a problem with IFHP page counting via PJL/Postscript > because it reports that it is done before it really is. I am > currently working with our HP rep and an engineer to try to get them > to fix this problem and it looks like I may be getting somewhere. > Can anyone on this list provide a more detailed technical description > of the problem than my simple summary above? I'd like to pass > detailed technical information on to the engineers but I don't think > I'm qualified to give them enough info. Please post to the list so > others can contribute. I'll summarize and send to the HP folks. A few comments to add to the message Duncan McEwan forwarded on for us: Different HP printers have different problems with this. The 4200 (and maybe some 4100 models) had problems where the empty job submitted after the "real" print job comes back as complete before the "real" job is complete. I suspect this is done to improve performance. Tektronix had a "pipelining" feature in their color printers that did this, but the user could _turn it off_ if accurate accounting is desired. Other HP printers, such as or LJ4500, will not respond to status queries AT ALL while a job is in progress. I think we ran across this with our HP Color LaserJet as well. LPRng asks it how it's doing, the printer says nothing, and eventually LPRng thinks it died and resubmits the job. This also happened if the printer got into a jammed or paper-out state. These printers do have some concept of whether they are actually done printing or not. You can get accurate information on this from the SNMP stack on the printer. On a LaserJet 4000/4100/4200, you can get it from .1.3.6.1.4.1.11.2.3.9.4.2.1.1.6.5.15 in the SNMP stack. The job statuses listed there will not go to "complete" until the last page is out and the page counter is updated. Yet this information is not available via PJL... -- ======================================================================== ==== John Perkins | University of Wisconsin-Madison Associate Researcher | Department of Computer Science [EMAIL PROTECTED] | 1210 W. Dayton St. 608-262-0438/608-262-6626 FAX | Madison, WI 53706-1685 ======================================================================== ==== ----------------------------------------------------------------------------- YOU MUST BE A LIST MEMBER IN ORDER TO POST TO THE LPRng MAILING LIST The address you post from or your Reply-To address MUST be your subscription address If you need help, send email to [EMAIL PROTECTED] (or lprng-requests or lprng-digest-requests) with the word 'help' in the body. To subscribe to a list with name LIST, send mail to [EMAIL PROTECTED] with: | example: subscribe LIST <mailaddr> | subscribe lprng-digest [EMAIL PROTECTED] unsubscribe LIST <mailaddr> | unsubscribe lprng [EMAIL PROTECTED] If you have major problems, call Patrick Powell or one of the friendly staff at Astart Technologies for help. Astart also does support for LPRng. Also, check the Web Page at: http://www.lprng.com for any announcements. Astart Technologies (LPRng - Print Spooler http://www.lprng.com) 6741 Convoy Court San Diego, CA 92111 858-874-6543 FAX 858-751-2435 -----------------------------------------------------------------------------
