Lenovo Laptop would not connect to wifi [Reason:INTERFERENCE ?]

The Lenovo laptop connected to wifi in the moring (home setting), but by evening, it would not. (The other wifi devices connected fine).

In the cable modem, the following messages were seen in the log:

Fri Jun 26 17:27:00 2015  Notice (6)  WiFi Interface [wl0] set to Channel 6 (Side-Band Channel:N/A) - Reason:INTERFERENCE
Fri Jun 26 17:26:41 2015  Notice (6)  WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A) - Reason:INTERFERENCE
Fri Jun 26 17:26:32 2015  Notice (6)  WiFi Interface [wl0] set to Channel 6 (Side-Band Channel:N/A) - Reason:INTERFERENCE
Fri Jun 26 07:14:28 2015  Notice (6)  WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A) - Reason:INTERFERENCE
Fri Jun 26 06:29:16 2015  Notice (6)  WiFi Interface [wl0] set to Channel 6 (Side-Band Channel:N/A) - Reason:INTERFERENCE

rebooting the laptop did not help, and troubleshooting the wifi also did not help.

but then in the modem's console, clicking on
Press "Reset WiFi Module" to restart just the WiFi Module only.
helped. what do you see could have happened? is it a modem issue or laptop issue, if any?
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25112Asked:
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Michael-BestCommented:
Reset is sometimes needed when the connection gets confused.
Not a modem issue or laptop issue.
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TemodyPickalbatros, IT ManagerCommented:
Try to forget member networks
Right click on the network go to open network and sharing center choose wireless network and remove member networks
After that go to advanced configuration on the wifi card on power options
Make sure no power saving or sleep apply on it
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25112Author Commented:
>>Reset is sometimes needed when the connection gets confused.
any reason why only one pc orlaptop would get confused and other wifi devices are ok?
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25112Author Commented:
do you see "member networks" in the error posted?

in
Control Panel\All Control Panel Items\Network and Sharing Center
i don't see any phrase "member networks" for the wifi.. pl guide.
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Kanti PrasadCommented:
Hi

Laptops have a switch to off and on wifi just see if that was not pressed by accident. If it works in the morning and going off in the evening then it won't be an equipment fault. Also generally there will be more load in the evening times and also connecting many devices might also have a slight impact.
If it once off then it is ok but if this is a frequent issue it is best to contact the providers support as generally modem/router needs to get an authorization lease from the network server every day to tell your router the public ip address and to connect to the Internet but if there is any faulty lease update sent then you will be disconnecting.
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Fred MarshallPrincipalCommented:
Some wifi access points / routers have a wireless mode where it will select the "best" frequency channel.  
It's often called Channel: Automatic instead of 1 through 11 (for 2.4Ghz).

This mode sometimes doesn't behave well with clients.  Some clients may not like the resulting frequency hopping.

I have found that NOT using "Automatic" channel selection is actually more stable in some situations.
Presumably it will find the least-used channel where there is the least interference.  Then it will switch channels to something that's supposed to be "better" / with less potential interference.

Are you using this mode?  You might try selecting a channel and sticking to it.  

If you install inSSIDer, you can see the other signals and might select a channel after looking at that.
In a densely populated area the result might be quite dynamic and this might not be best.
But you're looking at a single client machine.
Channel 6 is the most frequent default channel and, thus, perhaps the most populated and, thus, have the most interference.
Just pick a channel where there's no other signals with any strength and see what happens.
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David Johnson, CD, MVPOwnerCommented:
You may want to go into your cable modems configuration and change the wireless setting for the channel from auto to maybe channel 11.. it has already been trying 1 and 6 .. it would appear that someone in your neighbourhood arrives home in the evening and starts up their equipment and it interferes with your equipment and your laptop may just be in a convergence zone of the interference and misses the cable modems switch in channels.  in the 2.4Ghz band in which b/g/n operate it is a very crowded area.. microwave ovens, wireless phones. WIFI  etc are all crowded in there.
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25112Author Commented:
can you guide me where i could possible see this channel setting..

in the modem i see categories such as below:
port forwarding, port triggering, dmz, dynamic dns, device directory,
connection, firewall, software, hardware, local ip network..

this is a TC8305C
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David Johnson, CD, MVPOwnerCommented:
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25112Author Commented:
thank you David.. i have chosen 11 (what i understand from this post as least used channel). (I have not used inSSIDer yet to see what are the other competing signals).

now the wi-fi connection blanked out again a little while ago, but then again came back up again and this is what i saw in the error log: do you see this connected to the above in any way? did the message/error that started at 8:51pm lead it all the way to the INTERFERENCE error msg @ 8:55pm?

Sat Jun 27 20:55:05 2015  Notice (6)  WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A) - Reason:INTERFERENCE
Sat Jun 27 20:54:54 2015  Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=44:32:c8:ca:2b:8b;CMTS-MAC=00:01:5c:70:cc:52;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 27 20:54:54 2015  Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:32:c8:ca:2b:8b;CMTS-MAC=00:01:5c:70:cc:52;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 27 20:54:39 2015  Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=44:32:c8:ca:2b:8b;CMTS-MAC=00:01:5c:70:cc:52;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 27 20:54:39 2015  Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:32:c8:ca:2b:8b;CMTS-MAC=00:01:5c:70:cc:52;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 27 20:54:37 2015  Critical (3)  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=44:32:c8:ca:2b:8b;CMTS-MAC=00:01:5c:70:cc:52;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 27 20:54:37 2015  Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:32:c8:ca:2b:8b;CMTS-MAC=00:01:5c:70:cc:52;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 27 20:51:29 2015  Warning (5)  MDD message timeout;CM-MAC=44:32:c8:ca:2b:8b;CMTS-MAC=00:01:5c:70:cc:52;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 27 20:51:29 2015  Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:32:c8:ca:2b:8b;CMTS-MAC=00:01:5c:70:cc:52;CM-QOS=1.1;CM-VER=3.0;
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JohnBusiness Consultant (Owner)Commented:
Does the laptop work properly on a different router. This test makes it easier to determine laptop or router as the problem.
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Fred MarshallPrincipalCommented:
John Hurst asks an interesting question.  In view of the Interference report, I'd suggest the following:
- Does the laptop work properly on a different router in a different location?  e.g. at a coffee shop?
- Does the laptop work properly on a different router which is located at the same place as the current router?  (The purpose of this test is to determine if the Interference remains - perhaps not a conclusive test but a pretty good one and maybe a very informative one).
- Are there possible sources of interference at the location?  This would not only be other nearby wifi access points but other electrical / electronic devices including portable telphones, microwave ovens, etc.  It's entirely possible that this one laptop is more susceptible than any of your other computers.  That goes for other wifi signals and other electrical / electronic devices; either one.  LED light bulbs are a new potential source of electromagnetic interference.  Some of those are terrible.
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25112Author Commented:
yes the laptop works fine on a different router in a different location, but it works in this location also, but it is/was intermittent connection for a few days, i gave it last 2 days and it seems to have repeated the dropped connection only once.

 are cell phones considered wifi access points? (example: dsl based wifi different than cell phones)
what about ac, electrical heaters etc?
no LED bulbs in room...

in internet interference in home setting common (if it has not been so before)? this last 2 weeks seems to be the first time this has happened. would this apply to any wi-fi medium (cable/dsl/cellular)?

thanks-
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JohnBusiness Consultant (Owner)Commented:
are cell phones considered wifi access points?

If you set them up as Wi-Fi access points, they certainly can be and cause interference. Turn the feature OFF unless it is actively being use.

Also, I give our two phone static IP addresses on my home network because they like to steal IP addresses and such had a habit of occurring on a computer restart. Making phones static eliminates this.
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25112Author Commented:
ok.. so basically any wifi device is better off with static? (printers etc too)?
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25112Author Commented:
i used xirrus wi-fi inspector. (from cnet downlaods). it found the modem and also another '<Non-broadcasted> entry .. is that ok to ignore? (in this context of interference)?
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Fred MarshallPrincipalCommented:
it depends on what channels appear to have signals.  Non broadcasted just means the SSID isn't broadcasted and has nothing to do with anything here.  But such signals ARE there.  I still like inSSIDer as a monitor as it gives you a picture of spectral content (even if a bit contrived).
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JohnBusiness Consultant (Owner)Commented:
I use static printers because you do not want printers changing their bearings.

I use static phones because iPhones steal IP addresses (always choose the lowest one available).

However, having said that, I set my Cisco wireless router to channel 6, my neighbours use channel 6 (one uses channel 11).

I also use inSSider to see what is going on (and have it running now).
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Fred MarshallPrincipalCommented:
If you see a channel is in use, or at least in regular use, then avoid it and avoid channels around it (because they overlap as you'll see in inSSIDer).

That one may be able to use the same channel as a nearby site only says that their local signal levels are always high and can overcome any interference the nearby sites generate.  But that seems to NOT be your situation - thus, to be avoided.
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WilroffCommented:
Silly question from me, but do you have update your network driver to the latest version?
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25112Author Commented:
so far issue did not surface.. thanks all.

Wilroff, you mean the modem's drivers?
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WilroffCommented:
No i mean the driver for your wifi network card
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25112Author Commented:
good point. I will check .
this is path, not?
(device driver->network adapters->properties->Driver->Update drivers?)
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WilroffCommented:
Yes that is the path you need
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25112Author Commented:
Thank you.
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