04-06-2019 11:28 PM
Canon, apparently this issue has not been resolved. Everyone has been told different workarounds, but no definite answer. I just paid a good chunk of change for what I thought would be better than my Brother printer, but if it won't print without all this drama, it is definitly far worse. We were told this was one of Cannon's newest printers and assumed it would be great. Please help this to be true by fixing this bug! I hope to hear back soon!
04-29-2019 08:52 AM
I just setup this machine in one of our shops, imedialty saw similiar issue. The printer will go into sleep mode and disconnect from the wireless network. Sending a print job does not trigger the printer to wake up, and why would it?
Looking at the settings for the wireless setup, there is a an eco mode. I turned this off, and the printers wireless connection stays connected even if it has gone into sleep.
Problem solved for me.
04-30-2019 08:19 PM
05-10-2019 03:57 PM - edited 08-07-2019 01:38 PM
OK, I think I have successfully solved this issue on my network - the resolution is specific to ASUS router. I would guess similar settings exist on other routers.
Check out this post ( I am copying over so the instructions are not lost) - FOR ASUS ROUTERS ONLY
This solved pretty much all issues for me. I can print when the printer is sleeping, it wakes up, prints, and goes back to sleep again.
Edit : 8/7/2019 - I have returned the printer since it doesnt work with Unifi / Amplifi which is the gold standard for high throughput pro/ semi pro wifi systems. Too much headache.
08-02-2019 12:23 PM
I would very much like to follow these instructions, but none of the things you list under the "professional" tab are listed for my rouer. I have the ASUS RT-AC55U. Please help - thanks!
08-04-2019 01:08 PM
Thank you for sharing what worked for you and congratulations on successfully troubleshooting your issue.
For the benefit of others, I just want to point out that I can see from your instructions that the problem you are solving is for a wireless connection. That type of connection is always trickier than a hard-wired connection.
Many of us are still waiting for canon to solve their problem with hard-wired connections, for which their printer driver's failure has no excuse.
08-07-2019 01:21 PM
It is recommended that you contact your router manufacturer for assistance with your router settings.
08-07-2019 01:33 PM
08-07-2019 09:17 PM
I have had my MF634Cdw for over a year; every time Canon updates the drivers, I have issues with getting anything to print. This last update 7/26/19 changed my printer type to "AIR PRINT" . I have no idea what that is.
But this not waking up from sleep mode could be my problem, thought it has not ever happened before. How would I turn that Sleep mode off?