[cups.general] Why do the page counts (pages) of some completed jobs show unknown?

[Michael Sweet]

On Jun 1, 2010, at 8:27 PM, dejing zhang wrote:
> Why do the page counts (pages) of some completed jobs  show unknown?

CUPS generally depends on the driver you use to provide the page count information. Not all drivers produce PAGE: messages that allow the scheduler to track the number of pages printed.

For network printers we do try to use SNMP to gather the actual page count from the device as well.  However, for non-network printers and network printers that do not support SNMP you have to depend on the driver producing the PAGE: messages.

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Michael Sweet, Senior Printing System Engineer, PWG Chair