[GTALUG] Printing Problem - Can't find printer

[Allan Zhang]

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Did the printer show up when you wirelessly added it in CUPS, or did you manually add it using the known IP?

Maybe CUPS doesn't see it.

Wiki page here:
https://wiki.ubuntu.com/DebuggingPrintingProblems

Relevant part of wiki:

Open a terminal/console and run the commands: 
$ ping <IP of the printer> 
$ nmap <IP of the printer> 
Replace "<IP of the printer>" by the printer's IP address. The first command checks whether you can access the printer through the network, the second shows which port numbers are used by the printer and through this which protocols are active (80: Has web interface, 139: SMB, 443: encrypted IPP or encrypted web interface, 515: LPD, 631: IPP, 9100: JetDirect/AppSocket). Install the "nmap" package if needed.

Run the commands: 
$ /usr/lib/cups/backend/snmp 
$ sudo /usr/lib/cups/backend/dnssd 
The output shows whether the printers get found by CUPS or system-config-printer and with which device URIs and protocols.

Run the command 
$ /usr/lib/cups/backend/snmp <IP of the printer>
if a printer does not get found by the simple "/usr/lib/cups/backend/snmp" call.

Find out if your printer gets detected by CUPS: 
$ lpinfo -v




- -------- Original Message --------
From: Stephen <stephen-d at rogers.com>
Sent: May 27, 2016 11:44:08 AM EDT
To: GTALUG Talk <talk at gtalug.org>
Subject: [GTALUG] Printing Problem - Can't find printer

I am using Ubuntu 14.04
Printer is Epson WF-2630
Wi-fi connection. Hard coded IP address

When I try to print, I get a Gnome pop-up saying printer is off-line.
Using the web interface to CUPS the reported error is printer not found.

I can always ping the printer.
I can always print from a windows computer on the same network.

I can, from the CUPS web interface "modify" the printer settings. I
click through without changing anything.

When I am finished, the stalled print job is printed.

Any ideas how I can print without "modifying" the printer settings?

- --
Stephen
- ---
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