PyKota's FAQ : # $Id$ * Is print accounting ever exact ? No. Print accounting is **never** exact, because it depends on external factors like the presence of paper in the printer, the quantity of remaining ink in the print cartridge, paper jams, etc... All these things are very difficult to account for correctly, and no print accounting package deals with these artefacts correctly in all situations. We are however confident that PyKota is one of the more exact print accounting software, because by default it asks the printers for how many pages they have really printed. * Can PyKota account for ink usage ? No. Actually PyKota doesn't account for ink usage, but this may come in a future release. PyKota only accounts for pages printed and/or money spent. If ink accounting is a necessity for you, PrintBill is recommended instead of PyKota. PrintBill allows you to bill differently per color, and to bill depending on the percent of the ink covered part of the pages. * What is a 'dumb printer' ? In PyKota, the term 'dumb printer' defines a printer which doesn't understand PostScript AND doesn't have an internal page counter, AND for which you don't know how to compute a job's size in number of pages by analyzing its content. Any printer which is not a 'dumb printer' according to the above definition is supported with PyKota. * How can I make PyKota work with my non-postscript printer under CUPS ? From version 1.16alpha7, PyKota includes a CUPS backend which allows you to use any type of printer and any driver, provided your printer is not a 'dumb printer' (see above). * How can I use my 'dumb printer' with CUPS and PyKota. The solution is to plug the pykota filter into the filtering chain when the print job is still in PostScript format, before being converted to the dumb printer's native format. You can't use the cupspykota CUPS backend with 'dumb printers'. Here's how to do : - Disable raw mode by modifying *.convs and *.types files in /etc/cups, then restart CUPS. - If you print from Windows through Samba, don't put '-o raw' in the print command definition in smb.conf - Under Windows, use a PostScript driver set to maximum compatibility mode. - Modify *.convs and *.types files to insert the pykota filter into the filtering chain, as described here (url should be on a single line) : http://cgi.librelogiciel.com/pipermail/ ... ... pykota/attachments/20030721/753239b5/attachment.eml and restart CUPS. * I've got a great number of users. How can I automatically set an initial print quota for them on first print ? You have to define an external policy for unknown users, to automatically add them to the Print Quota database. The sample configuration file contains examples to do this. * How can I diagnose the problem when something goes wrong ? Put "LogLevel debug2" in cupsd.conf (usually in /etc/cups/). Then put "logger: system" and "debug: yes" in /etc/pykota/pykota.conf. Finally restart CUPS. CUPS' error_log file will now contain many informations which will help diagnose your problem. Also your syslog's output for the LPR facility (usually /var/log/lpr.log) will contain PyKota's debug messages, notably all database related queries and their result, be your database PostgreSQL or OpenLDAP. With these two files the problem can usually be diagnosed within minutes. Send them to the mailing list and wait for an answer. * Some, not all, print jobs are never accounted for, why ? From version 1.16alpha7, you can now use the cupspykota CUPS backend, which ensures that all print jobs will be accounted for. The use of the old pykota filter is deprecated with CUPS. It remains the filter of choice for LPRng though, or when you absolutely need to support a 'dumb printer' (see definition above). * When printing from Windows, the jobs are never accounted for, but from *nix they are. Could you explain the reason for this ? First refer to the point above. If this doesn't solve your problem, try to set your print driver to PostScript mode and check the "maximum compatibility" box in its configuration, instead of "maximum speed". Often HP printers come with both a PCL and a PostScript driver under Windows. Don't install the PCL one. * My question isn't answered there, can you help ? Sure. Ask your question to the mailing list. If this is a frequently asked question, or if your problem is on the contrary very specific, it will probably be added to this document. You can also ask questions by IRC : /server irc.freenode.net /join #pykota