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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?
RoutersLaptops NotebooksWindows 7

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25112

8/22/2022 - Mon
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Michael Best

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25112

ASKER
>>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?
25112

ASKER
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 Prasad

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hypercube

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David Johnson, CD

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25112

ASKER
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

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25112

ASKER
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;
John

Does the laptop work properly on a different router. This test makes it easier to determine laptop or router as the problem.
hypercube

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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25112

ASKER
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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John

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25112

ASKER
ok.. so basically any wifi device is better off with static? (printers etc too)?
25112

ASKER
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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hypercube

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John

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).
SOLUTION
hypercube

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Wilroff

Silly question from me, but do you have update your network driver to the latest version?
25112

ASKER
so far issue did not surface.. thanks all.

Wilroff, you mean the modem's drivers?
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Wilroff

No i mean the driver for your wifi network card
25112

ASKER
good point. I will check .
this is path, not?
(device driver->network adapters->properties->Driver->Update drivers?)
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25112

ASKER
Thank you.
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