Created attachment 1264849 [details]
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
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Submit a largish print job (20 pages or more). Wait for it to complete.
CUPS Web interface will show some number of pages less than those
that were actually printed.
CUPS should show the correct number of pages.
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:
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.