I am having an issue when printing Duplex. I am using a HP Laserjet 1020 connected to OMV and shared to my network. This particular printer has no buttons (just the On/Off switch) and has manual duplex.
If I connect the printer directly to my computer via USB and select duplex printing, the printer will print first one side of the sheets and then make a halt. A dialog appears on the screen asking me to flip the pages and feed them again to the printer. After I do that, I click "continue" in the dialog and the printer resumes printing and prints the other side of the sheets. The dialog looks something like this, with the difference that my printer has no "Go" button. Instead I must click "Continue":
However, when the printer is connected to OMV and shared to the network, there is no way that I can get this dialog. I can print without issues from any PC in my network. But if I choose Duplex, the printer will print one side and, then halt so I can flip the pages. But since I am not getting the duplex dialog in the PC, I can't instruct the printer to resume printing.
I already tried resuming printing directly from the CUPS interface, but the job appears as completed. The printer has no buttons, meaning that I can't resume printing from the printer. I also tried with different drivers (tried both with Foomatic and HPLIP) but none of them worked.
From the Foomatic webpage, I know that the driver supports duplex printing for my printer. Is this problem because the printer is being shared over the network? Or do you know a workaround for this.