Bug#848712: cups-filters-core-drivers: driverless is not always reliable

[Brian Potkin <claremont102@gmail.com>]

Package: cups-filters-core-drivers
Version: 1.13.1-1
Severity: normal
Tags: upstream



1. I have an AirPrint-enabled printer on the network (an HP ENVY 4502)
   and a CUPS server too. The cups service on the server is stopped. A
   client computer has had the lpd, socket, usb, snmp and dnssd backends
   disabled using 'dpkg-reconfigure cups'. ippfind gives

        ipp://envy4500.local:631/ipp/print

   A script on the client has run the commands ippfind, driverless and
   lpinfo -v 50 times on the run. The success rate for ippfind and
   driverless is 100%; lpinfo -v averages at 96%-98%.

2. cups was now started on the server. ippfind gives

	ipp://desktop.local:631/printers/Colour
	ipp://desktop.local:631/printers/LaserJet-300
	ipp://desktop.local:631/printers/DotMatrix
	ipp://desktop.local:631/printers/DotMatrixT
	ipp://desktop.local:631/printers/qqq
	ipp://desktop.local:631/printers/rawq
	ipp://envy4500.local:631/ipp/print

   The success rate for ippfind when the script is run is 75%. For
   driverless it varies from 24% to 64%. For lpinfo -v it is 66% but
   it has been seen to be as low as 8%.

   The success rate for ippfind can be increased to a consistent 100%
   by using 'ippfind -T 5' but there is nothing similar which can done
   for driverless as it stands.

Regards,

-- 
Brian.