Losing network or internet connection after sleep/wake

I definitely think this is a Mavericks issue. My iMac running Mavericks is the ONLY system in the house that drops the network randomly while all other systems never lose the network. No idea how to resolve this, but here is the workaround I'm posting:

I've had the 'network drop' issue with my Airport Extreme for the last 2 months. It reconnects when I pull the ethernet cable and plug it back in. I've tried downgrading the AE firmware, resetting to factory, etc. Nothing worked. I finally threw in the towel and created a script that monitors my network connectivity and restarts my interface if it senses it has dropped:

##############

#!/bin/ksh

while true

do

yup=`ping -c1 -t2 www.google.com|grep from`

if [[ -n $yup ]]

then echo "Internet is connected!"

else

ifconfig en0 down; ifconfig en0 up

echo "Down at `date +%m%d%Y%H%M%S`">>./dropped.out

fi

sleep 5

clear

done

###############

I know its a workaround, but its saving me the headache of constantly pulling my cable and putting it back in!

Good luck!

-Mike Gray

Great idea! If we can find out when it happens we may be able to find somehing in Console. I am going to try this out, thanks. Also, my Mac is also the only one that has these random issues. Of counrse my Mac is one that I also had to replace the display within a year and then the logic board went out right after the warranty so I am not too surprised of another issue. People often say how great and reliable these machines are bit I have had nothing but problems with this and the amount of money it takes to keep it running make me wonder if it's worth it. Perhaps a cheaper more reliable $300 linux machine will be my next machine the next time a major component fails on this POS.

Well I've had zero luck trying to correlate the drops with anything in the logs. But it definitely happens more often when I'm doing more intense network traffic like RDPing into work. Unless we could get into debug mode on the AE, we may be out of luck trying to troubleshoot this. Right now the script polls every 5 seconds, but I may have to bump it up to 4 or 3 seconds. Very frustrating! Please post if you find anything!

Did you try creating a new Location ? It had a dramatic effect to reduce my network drop out rate.

I removed all my previous locations, created a new one, and turned off bluetooth. Finally, my Macbook Air has been working as it used to before upgrading to Mavericks i.e. when I open the lid it connects to WiFi instantly and it can now find a signal that it was already using before I closed the lid. I have had several days of repeat success at home and away from home.

When I turn bluetooth on the problem returns, so now I have a toothless computer thanks to Mavericks. Good thing I like the trackpad. After the last few weeks, I now see many many threads here when searching for WiFi Mavericks issues. It seems to disingenious for Apple to host these discssions without reading, consolidating, moderating oor acknowledging a problem in any way. For those of you here, thanks for keeping the discussion going and sending your feedback, and thanks for letting me vent.

… works like charm here, even without a new location. tried all the other hints, nothing worked but turning bluetooth off (late 2011 MBA). so i have to decide, wether wlan or bluetooth. not really cool.

Now that it seems the problem has been isolated, I urge everyone to submit feedback so that Apple knows exactly what's wrong and what causes/fixes the issue.

Here's the feedback I just submitted. Feel free to use/adapt it:

When waking from sleep, my Macbook Air (MBA) frequently loses the connection it previously had to the wireless network it had prior to going to sleep. This happens regardless of where I am: my home, my office, or out on the road.

After a lot of troubleshooting (including many calls to AppleCare support), it has become apparent that the problem involves bluetooth. When I completely turn off bluetooth in System Preferences, my MBA instantly reconnects to the network when waking from sleep, as expected. As soon as I turn bluetooth back on, the problem reappears.

Turning off bluetooth in order to be able to connect to the internet is obviously not a suitable long-term solution, so I am hopeful this will be addressed in a software or firmware update. The recent 10.9.1 update didn't help.

Simply switching off Bluetooth worked for me. :-)

unfortunately bluetooth may be needed for keyboard and magic mouse :-(

As I was entering my feedback on the site, with Bluetooth disabled from yesterday, I saw the same issue...."Resolving host" in Chrome. I sent feedback to Apple anyway, this needs to be addressed.

Interesting. For me wifi has connected instantly every time since turning off BT. But it's only been about 6 hours, so maybe it will get worse again.

Anyhow, while I'm traveling I don't really need BT but when I'm at home with my BT mouse and keyboard this is a dealbreaker.

Well, it's been >24 hours now and I've opened and closed my MBA numerous times, and since I've had bluteooth off it has reconnected every time instantly.

+1

Since then I have had no issues, the last drop may have been my internet provider. I will not need my bluetooth until after all the holidays so I will leave it as is and see if this resolves it. Good find in any event.

I turned bluetooth off on my system, and 10 minutes later my network dropped again. So at least for me, killing bluetooth didn't solve it. 😟