Cannot print to Pixma MG7150

[cliffhanger]

Hi

I've not had a problem with Turboprint on Linux until now. I've installed 2.58-1 using tgz and deb with the same result.

The printer fails to respond to the correct Ip address given on its front panel i.e. 192.168.1.31. I have pinged this address and get the following:

PING 192.168.1.31 (192.168.1.31): 56 data bytes
64 bytes from 192.168.1.31: icmp_seq=0 ttl=64 time=162.969 ms
64 bytes from 192.168.1.31: icmp_seq=1 ttl=64 time=84.029 ms
64 bytes from 192.168.1.31: icmp_seq=2 ttl=64 time=116.576 ms
64 bytes from 192.168.1.31: icmp_seq=3 ttl=64 time=27.024 ms
64 bytes from 192.168.1.31: icmp_seq=4 ttl=64 time=49.234 ms
64 bytes from 192.168.1.31: icmp_seq=5 ttl=64 time=72.091 ms
64 bytes from 192.168.1.31: icmp_seq=6 ttl=64 time=134.777 ms
64 bytes from 192.168.1.31: icmp_seq=7 ttl=64 time=138.829 ms
^C--- 192.168.1.31 ping statistics ---
8 packets transmitted, 8 packets received, 0% packet loss
round-trip min/avg/max/stddev = 27.024/98.191/162.969/44.536 ms


I've added the printer to the Control using both 'standard printer' OR 'other printer' using CUPS URI = bjnp://192.168.1.31:8611 followed by the printer name. Result is no communication. No test page. The Status Monitor remains greyed out with no reponse. If I close Control and then reopen the printer setup is gone.

The installation puts the bjnp file under /usr/lib/turboprint. It's also under /usr/lib/cups/backend

Can anyone help here please?

[cliffhanger]

I assume from the lack of reponses that I've done everything possible?

The odd thing is that I have 'simple-scan' installed and it works! So the ip address is correct then.

Cliff

[cliffhanger]

I may have found the issue.

E:Unable to locate package python-gobject

This is present at a source file install

Now I have python-gobject installed, in fact I have reinstalled it.

So. Does anyone know if one can pass options/locations to a source file install. I suspect not

Cliff

[zedonet]

Hello, older Canon printers use the "BJNP" network protocol, newer ones accept standard network printing protocols like "LPD" and "Socket", some support both. I am not 100% sure about the MG7150.

You can try the following URIs in TurboPrint Control:

bjnp://192.168.1.31
socket://192.168.1.31
lpd://192.168.1.31

where 192.168.1.31 is the printer's IP address (adjust if necessary).
The port number ":8611" at the end of the URI is optional.

For debugging purposes, you can open a Terminal window and enter the command

/usr/lib/cups/backend/bjnp

and check if the printer is found and listed (printer must be powered on and connected via LAN or WiFi).

Also helpful might be the TurboPrint log file /var/log/turboprint/print.log - you can send it by email to mail <at> turboprint <dot> de , please refer to this forum post.

[cliffhanger]

Thanks for that

bjnp://192.168.1.31:8611 or something similar has always worked for me. This time I suspect it is a graphical issue. See my last post.

I just installed Turboprint into another distro from source and it works straight away. The Turboprint Monitor is visible even before setting a printer.

In mine it's greyed out and setting up a printer is lost when Turboprint closed down.

Cliff

[cliffhanger]

Incidently '/usr/lib/cups/backend/bjnp' gives:

network bjnp "Unknown" "Canon network printer"

This is absurd. The ping works and the printer is recognised in the other distro.

[zedonet]

This is really strange. Could there be a problem with network or firewall configuration?

[zedonet]

Another idea:
As you wrote that the printer setup is lost when you reopen TurboPrint Control, it looks like the printer cannot be saved to the system - possibly because of missing access rights. Please try to start TurboPrint Control from a terminal window with super-user rights by entering "sudo turboprint" (you will be asked for your user password then). Maybe printing fails because the printer is not installed properly in the printing system.

[cliffhanger]

Thanks

The suspected graphical was a red herring. The same errors were present in the setup on the other distro which works.

Just installed my printer by going to http://localhost:631. It appears in Turboprint as normal. I assume it should remain there now!

Can't test it just yet but see no reason it shouldn't work.

I was working with super-user rights when trying to setup through Turboprint. This strange.

Cliff

[cliffhanger]

lpstat -t gives:

scheduler is running
no system default destination
device for MG7150: bjnp://192.168.1.31:8611
MG7150 accepting requests since Wed 17 Dec 2025 09:42:49 PM GMT
printer MG7150 is idle. enabled since Wed 17 Dec 2025 09:42:49 PM GMT