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jamesbenson
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Macbook drops connection after sleeping

I've a new macbook pro and one of the new Vm routers (with wireless ac).

 

I've noticed that whenever my macbook goes to sleep, even for a few minutes it will typically drop the WiFi connection, it appears to be connected but it's not, I have to turn off wifi and turn it back on to reconnect.

 

This might be related to OSX Yosemite, as that has some Wifi problems, however I don't really know how to tell!

 

Where do I start?

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Re: Macbook drops connection after sleeping

Hi jamesbenson,

 

Sorry to hear the wifi is dropping.  I've checked this out, it sounds like a Yosemite problem and I've found an article to help with that sort of issue: http://osxdaily.com/2014/11/19/os-x-10-10-1-wi-fi-connection-issue-troubleshooting/

 

Saying that, there's a problem with the power levels on your hub at the moment, the upstream levels are too high.  I'll send you a PM so we can address that with an engineer booking.  Get back to me via PM when you can and I'll book that in asap Smiley Happy

 

Speak soon Smiley Happy

Kev

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jamesbenson
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Re: Macbook drops connection after sleeping

Power levels etc:

 

Downstream ChannelsLock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors

Locked13298750000 Hz256 QAM3.4 dBmV 38.3 dB3786341
Locked9266750000 Hz256 QAM3.8 dBmV 38.3 dB5572353
Locked10274750000 Hz256 QAM3.7 dBmV 38.3 dB4711328
Locked11282750000 Hz256 QAM3.5 dBmV 38.3 dB1792344
Locked12290750000 Hz256 QAM3.1 dBmV 39.0 dB485366
Locked14306750000 Hz256 QAM3.4 dBmV 38.6 dB428339
Locked15314750000 Hz256 QAM2.8 dBmV 38.6 dB495374
Locked16322750000 Hz256 QAM3.2 dBmV 38.3 dB460355

 

 

Upstream ChannelsLock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate

Locked1039400000 HzATDMA52.3 dBmV64QAM6400000 Hz5120 Ksym/sec
NotLocked00 Hz 0 dBmV  0 Ksym/sec
NotLocked00 Hz 0 dBmV  0 Ksym/sec
Locked946200000 HzATDMA53.0 dBmV64QAM6400000 Hz5120 Ksym/sec
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Re: Macbook drops connection after sleeping

Hi jamesbenson,

 

Sorry to hear the wifi is dropping.  I've checked this out, it sounds like a Yosemite problem and I've found an article to help with that sort of issue: http://osxdaily.com/2014/11/19/os-x-10-10-1-wi-fi-connection-issue-troubleshooting/

 

Saying that, there's a problem with the power levels on your hub at the moment, the upstream levels are too high.  I'll send you a PM so we can address that with an engineer booking.  Get back to me via PM when you can and I'll book that in asap Smiley Happy

 

Speak soon Smiley Happy

Kev

The do's and don'ts. Keep the community welcoming for all. Follow the house rules


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jamesbenson
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Re: Macbook drops connection after sleeping

Thanks will give that a try.
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jamesbenson
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Re: Macbook drops connection after sleeping

Seems to make some difference simply adding a new network location, I've not reset the SCM yet, the problem has only happened once since Monday.

 

Engineer came round and adjusted power levels, also fitted an amplifier as we have 4 boxes and the Internet running from one cable so said I could benefit from one.

 

Can a forum team member tell me if the power levels are good now please?

 

Downstream ChannelsLock Status Channel ID Frequency Modulation Rx Power RxMER Pre RS Errors Post RS Errors

Locked12290750000 Hz256 QAM5.2 dBmV 38.6 dB13877294
Locked9266750000 Hz256 QAM5.6 dBmV 38.3 dB16107278
Locked10274750000 Hz256 QAM5.7 dBmV 38.3 dB10281324
Locked11282750000 Hz256 QAM5.6 dBmV 38.3 dB6924298
Locked13298750000 Hz256 QAM5.5 dBmV 39.0 dB3349310
Locked14306750000 Hz256 QAM5.5 dBmV 39.0 dB2370966
Locked15314750000 Hz256 QAM5.3 dBmV 39.0 dB852285
Locked16322750000 Hz256 QAM5.5 dBmV 39.0 dB25511022

 

 

Upstream ChannelsLock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate

Locked1039400000 HzATDMA40.8 dBmV64QAM6400000 Hz5120 Ksym/sec
NotLocked00 Hz 0 dBmV  0 Ksym/sec
NotLocked00 Hz 0 dBmV  0 Ksym/sec
Locked946200000 HzATDMA41.3 dBmV64QAM6400000 Hz5120 Ksym/sec
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Re: Macbook drops connection after sleeping

Hi Jamesbenson,
 
Those power levels look perfectly fine now. How has everything been this week? You mentioned you've only had one drop out since Monday. Has the article Kev linked helped at all?
 

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jamesbenson
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Re: Macbook drops connection after sleeping

It seems to help somewhat but I still get the same problems every now and again. It's happened twice this week now but does not happen regularly like it did before.

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BillBudd
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Re: Macbook drops connection after sleeping

Hi,

 

I too have this issue.  My old Macbook Pro (2011) never had this issue, but my new model (three weeks old) has exactly the same issue.  I have tried all the advice in the OSX daily post, no difference.  I have also started a dialogue with Apple tech support.  Between us we have tried numerous things, nothing has resolved the issue so far.

 

The disconnects manifest themselves as I am unable to ping the router, you get constant time outs.  Usually happens after the machine has been in sleep mode.  It occurs on both the 2.4 and 5ghz frequencies.

 

Screen Shot 2015-09-09 at 10.29.14.png

Screen Shot 2015-09-09 at 10.30.07.png

I have also spoken to Virgin Media tech to see if my router was at the latest firmware revision, he said it was up to date.

 

Any help gratefully received, this is driving me nuts.

 

Kind regards,

 

Bill

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Re: Macbook drops connection after sleeping


BillBudd wrote:

 

.....

Any help gratefully received, this is driving me nuts.

 ....


When your MBP resumes after "sleep" can you reconnect if you disable and re-enable it's WiFi?

If not then ensure you have DHCP Reservation set for the MBP w/lan mac address in SHub Advanced Settings.

Confirm your Retina OSX version is 10.10.5 and post your SHub firmware version (192.168.100.1, RouterStatus top RH corner, Information, SoftwareVersion).

Regards Tony
"Life is a Binary Inspired Turing Computed Hologram"(don't PM or @Mention me - in case ignoring you offends)
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BillBudd
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Re: Macbook drops connection after sleeping

Tony,

 

Thank you for your response.  Yes it will reconnect if you disable and re-enable WiFi.  However the issue will also occur intermittently after the Macbook has been awake for some time.  The issue tends to occur more after a "sleep".  The WiFi actually remains connected, but Safari stops working and if you ping the router it times out and cannot be reached.

 

A re-boot of the router and/or the Macbook will usually resolve the issue, but sooner to later it will come back.  I have tried a DHCP reservation, this had no effect and the issue still occurs.

 

Screen Shot 2015-09-09 at 19.29.42.png

 

Once again thank you for your response.

 

Regards,

 

Bill

 

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