Red Hat Bugzilla – Bug 1434153
CUPS print jobs show incorrect number under the "pages" column
Last modified: 2018-10-23 01:16:07 EDT
Created attachment 1264849 [details] Proposed Patch Description of problem: CUPS mechanism for reporting the number of pages in a print job using SNMP is unreliable. Would like the ability to disable that mechanism. Version-Release number of selected component (if applicable): cups-1.6.3-27.el7 How reproducible: 100% Steps to Reproduce: 1. Submit a largish print job (20 pages or more). Wait for it to complete. Actual results: CUPS Web interface will show some number of pages less than those that were actually printed. Expected results: CUPS should show the correct number of pages. Additional info: Before it sends anything to the printer, the socket backend uses SNMP to get the printer's value for "prtMarkerLifeCount", which is the total number of sheets printed over the life of the printer. When the printer signals that the job is complete, the backend does a second SNMP request for "prtMarkerLifeCount". It then computes the total pages in the job by subtracting the two values. The problem is that the printer is reporting that the job is complete before all the sheets have actually been printed. Thus when the socket backend makes the second SNMP request, not all the pages in the job are accounted for, and the value is incorrect. The attached patch gives users the ability to disable SNMP page counting by adding: *cupsSNMPPages: False to the printer's PPD file. When SNMP page counting is disabled, CUPS uses the "PAGE: 1 1" messages from the filters to increment the page count for the job. The result reflects the actual number of pages in the job, but not necessarily the number of pages actually printed.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:0782
The reason behind this problem is CPU does not count pages sent to the CPU server and it is because windows send the page as RAW to the CPUs.To resolve this just change the windows Driver to Generic -> Ms. Publisher Imagesetter - now you will be able to see the page counting perfect in /var/log/cups/page_log, but the printing quality can decreases. for more visit https://www.canonprintersupportnumbers.com/canon-printer-setup/