Hello there,
I have this Raspberry Pi running OMV, now with a RTC and from hard drive! But I still have this annoying issue with the printer. From the other Mac I have running El Capitan, all print jobs are stopped on the server (OMV), which displays
/usr/lib/cups/filter/rastertoqpdl failed
in the CUPS interface as the reason for failure. I am not quite sure about more detailed information, as attempts to display the Syslog content ends up with a "Communication failure" after a long while stuck at the "Loading" screen. This error message itself doesn't give more details. Even if the RPi is no powerhouse, is it reasonable to think it may simply answer too slowly for OMV to work properly? That seems unlikely since thousands of others run OMV on such a board without much issues.
Why do I see this "Communication failure" message so often?