Inconsistent printing with CUPS on Raspberry Pi
I am printing an image with a thermal printer off of a raspberry pi. This works fine most of the time but I have an issue where the job never completes.
The command is just a simple: lp <filename> and I have the thermal printer as my default. This works but occasionally, it won't print in that terminal. Then just opening a new terminal and sending the same exact command works. I've had to just have a handful of terminals open and jump between them until one of them prints it.
Does anyone have any insight to why this would be happening and what a possible solution might be?
I am running this from:
Raspbian Stretch
CUPS v2.2.1
Zebra ZD410
Here is the end of the output of an unsuccessful job (Job 118) and successful job (Job 119) from /var/logs/cups/error_log
I ran into a very similar issue to the one you are describing with Zebra ZD410 printers and cups printing from RaspberryPi.
By default, between each print job cups will reattach the usb printer. The ZD410 printer does not like when cups does that and the next print job will appear to go to the printer, but it won't print and there will be nothing in the logs that show any errors. This happens intermittently but frequently enough to make the printer unusable.
I was able to fix this problem by deleting the ZD410 printer from cups and adding it back using lpadmin and putting this configuration flag at the end of the lpadmin -p command:
-o usb-no-reattach-default=true
Try my suggestion and please let me know if it resolves your issue. Hopefully, this will help others with this problem as well.
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