I had very long or hung "Processing Job" on the HP LaserJet 4000 while
HPLIP reported "Job Completed." hp-doctor reported everything is fine.
Linuxmint 18 64-bit on Thinkpad T400.
Someone suggested change driver from Postscript to PCL or vice versa.
I uninstalled the printer, installed it with
Hi, made the tests...
Can ping printer.
Nmap shows open ports 9100 9101 9102 and 80
Cups snmp seems correct
network socket://192.168.1.100:9100 HP Officejet 4500 G510n-z
Officejet 4500 G510n-z MFG:HP;MDL:Officejet 4500
G510n-z;CMD:MLC,PCL,PML,DW-
Got it!
Not an ubuntu or cups bug in the end, at least so it appears.
It is the wifi access point / adsl unit.
With the zyxel prestige 600 it does not work
With any other wifi access point / adsl it works.
Now... why should an access point interfere with lan to lan
communication on the 9100
Please first make sure all hanging print jobs are removed. Try to remove
them at first via a job viewer or via cancel -a. If needed kill any
remaining hanging processes.
Then please follow the instructions of the sections CUPS error_log and
Capturing print job data on
