Can you please activate the CUPS debug mode following the instructions of the section "CUPS error_log" on https://wiki.ubuntu.com/DebuggingPrintingProblems and leave it activated. As soon as the problem occurs again, please attach your error_log to this bug report.
Can you please activate the CUPS debug mode following the instructions of the section "CUPS error_log" on https:/ /wiki.ubuntu. com/DebuggingPr intingProblems and leave it activated. As soon as the problem occurs again, please attach your error_log to this bug report.