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Occasional Contributor
Posts: 8
Registered: ‎05-01-2017

Re: MX922 goes to sleep and loses WiFi connection

You can't read?  I posted the fix.

 

 My mx922 now works fine with cloudprint, has been up since yesterday.

 

 

Occasional Contributor
Posts: 6
Registered: ‎08-05-2014

Re: MX922 goes to sleep and loses WiFi connection


pscanon wrote:

You can't read?  I posted the fix.

 

 My mx922 now works fine with cloudprint, has been up since yesterday.

 

 


Disabling DRX doesn't work in all cases.  If you go back and read my original post, I reported that on my MX922 disabling DRX in fact made my printer behave worse. 

 

Either you got lucky and got a MX922 which doesn't have the exact same sleep-failure bug as everyone else, or you just haven't let your MX922 go idle for long enough to trigger the bug. 

 

And even on my MX922 sometimes it works fine even after a long sleep (eg from Fri PM to Mon AM) and other times it fails after being idle for only 4-6 hours. Perhaps it's triggered by temperature, or static-discharge, or very large print jobs, or whatever. Whatever triggers it it makes it seem completely random whether MX922 works just fine or goes to sleep and never wakes up.

 

 

I suspect the failing MX922s all share some sort of bug that affects how the MX922 keeps track of realtime events. And that timing bug causes the MX922 to sometimes miss the window for (just or stops doing), the periodic handshakes with the Wifi router to keep its session alive. My wild-assed-guess is that some timing related component is sometimes out of spec just enough so that only some of the MX922's are affected. For example, if the MX922's Wifi clock were only accurate to +- 20% rather than +-1%, then some MX922s would work fine and others would be broken. So perhaps in your case, changing your DRX setting tweaked your MX922's timing just enough in the right direction to compensate for whatever the underlying bug is that makes the MX922 so unreliable for so many people. And in my case it tweaked my MX922's timiing further outside the correct operating range. But like I said that's a 100% pure guess. Perhaps someday when I completely run out of other things to do I'll snoop the Wifi traffic and get some hard evidence.

Occasional Contributor
Posts: 8
Registered: ‎05-01-2017

Re: MX922 goes to sleep and loses WiFi connection

 

My mx922 printer is about 3 years old.  There is nothing special about it.  I updated the firmware in November, hoping that would fix the sleeping problem. (it didn't).   I assigned a static IP internal address, 10.0.0.9, 3 years ago in the router and and the printer manually, and never changed it. 

 

I had the same exact issue with it going to sleep and losing cloud print until I disable both the wired and wireless DRX settings, through the printers web interface from my Chromebook.,  a few days ago on a hunch. I restarted it remotely to apply the settings.

 

SInce disabling DRX,  the only time I've had to restart it is after losing power.    When I did, I used the menu to tell it look for cloud print jobs, there were none at that time.

 

It's been more than 30 hours since I last restarted the printer and my house closcks. . I printed one page yesterday  and another today anout 20 minutes ago.

 

The display was off most of yesterday and still off this morning. The wifi and blue menu LEDs have been on  continuously..  It woke up turned on when I printed the recent page. 

Screenshot 2017-05-06 at 10.37.39 PM.png

 

Screenshot 2017-05-06 at 10.39.26 PM.pngScreenshot 2017-05-06 at 10.38.27 PM.png

It may be unrelated but the wifi transmission speed has risen from 65Mbps tp 72.2Mbps after the last configuration change.

Occasional Contributor
Posts: 22
Registered: ‎03-08-2017

Re: MX922 goes to sleep and loses WiFi connection

There is an answer. Set the IP address in router to static for both modes of the printer; wired and wireless based on different MAC addresses and it solves the problem as long as the IP address you set is above (still within DHCP range) the number of devices that will use your DHCP range, so there wont be a conflict when the printer goes to sleep and then is restarted.  If for some other reason, the printer and router still do not synchronize, you can always reset the printer manually as listed in my previous thread(s) and then reconfigure using the router static IP address you assigned for both modes.  This has always fixed the problem.  Saying it shouldn't be this way may be valid and noting for liability reasons Canon will not suggest to reconfigure your router for static ip for obvious reasons, but the solution I listed just prior to this message worked every single time and since the IP static address, I have never had a problem.

Occasional Contributor
Posts: 8
Registered: ‎05-01-2017

Re: MX922 goes to sleep and loses WiFi connection

[ Edited ]

 I alway have and always will use static addressing on my home networks, for security reasons.

 

I had the same configuration for months before disabling DRX. Only after disabling them did the sleep issue stop.

 

I included the entire configuration because software setting can interact. I know that this configuration works.  

 

One thing I failed to mention before was that I set the printer to use Googles DNS services.  I did this previously following a Youtube suggestion.  This avoids problems with the ISPs secondary DNS servers that can become poisoned or contain incorrect information. Google has an extensive systemi placeto keep its DNS tables accurate, current and secure., plus it always knows where its own servers are.

 

The combination may be the cure.

 

Menu,web service setup,ok,Dns Server setup,ok,Manual setup,ok,008.008.008.008,ok,yes,008.008.004.004,ok.

New Contributor
Posts: 1
Registered: ‎05-11-2017

Re: MX922 goes to sleep and loses WiFi connection

I've read the problems wireless printer setup  see open  and my problem finish
kensekar
Occasional Contributor
Posts: 8
Registered: ‎05-01-2017

Re: MX922 goes to sleep and loses WiFi connection


kensekar wrote:
I've read the problems wireless printer setup  see open  and my problem finish



what?

New Contributor
Posts: 1
Registered: ‎05-12-2017

Re: MX922 goes to sleep and loses WiFi connection

Just like all the others who have posted here, I am also having that problem.

All-mac environment;  latest upgrade on all devices.

Canon MX922

 

I want to emphasize one aspect of the issue that hasn't had a lot of coverage:  this problem occured GRADUALLY.    It started maybe 3-4 months ago, maybe once every 1-2 days or so.   It was most likely to occur in the later evening/early morning ... especially after streaming videos (strange, huh?).  I'm not a network techie, but it seems like some buffer or counter exceeded some sort of limit or there's a memory overflow or something.   Either that, or the gradual nature of the decline in the ability to connect could be related to iMac software updates.    Please don't quote/berate me on my non-technical comments, I'm just explaining the circumstances around the issue occurring.

 

NOW, for the last couple of days, I literallly have to shut down and restart the printer for EACH and EVERY print request.   

 

 

 

 

New Contributor
Posts: 2
Registered: ‎05-06-2017

Re: MX922 goes to sleep and loses WiFi connection

I disabled DRX and hard coded the IP address on the printer.  I also reserved that IP address (using the hardware address of the printer) in my router's DHCP configuration for good measure.  My printer now responds when I send it a print job without having to restart the printer.  This is reasonable for an enterprise network printer, though I've never had to do this at home before.  Putting this in your installation documentation, at least as a strong suggestion, would help others struggling with a new Canon printer.

Occasional Contributor
Posts: 22
Registered: ‎03-08-2017

Re: MX922 goes to sleep and loses WiFi connection

Amen! I had talked directly with Canon on this issue; yet, the issue of liability came up with guiding users through each of the routers and how their responsibility could not involve "altering" the routers. However, as you have ascertained, the "permanent" fix involves the static IP in DHCP and matching that address on printer configuration for both the wired and wireless with correlation to MAC address
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