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Wifi Constantly Dropping in Lion

523375 Views 2,266 Replies Latest reply: Mar 28, 2014 2:35 AM by WSR RSS Branched to a new discussion.
  • CT Level 6 Level 6 (14,995 points)
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    Jan 30, 2013 4:27 AM (in response to Happel)

    Can't confirm.

  • gphonei Level 1 Level 1 (0 points)
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    Jan 30, 2013 11:46 AM (in response to Happel)

    Happel wrote:

     

    I'm sorry, but this is just a big waste of time and the biggest pile of .... you can imagine. This problem is caused solely by Apple and Apple alone. Apple did something with (Mountain) Lion what's causing these issues, not Cisco, Linksys, Netgear or any other manufacturer of wireless routers. It's great that Apple (supposedly) is pushing 802.11n to the max, but when that means I can only connect reliably to certain hardware of certain vendors and have to mix and match that with certain firmware versions, thanks but no thanks. I'd rather have a connection which is a little bit slower, but allows me to connect to any access point I want.

     

    I have done a lot of testing on this, even tried all of the 'desperate' nonsense solutions, but when you have an early 2008 Macbook running Lion, you can't keep wifi connected to certain access points. It's really annoying, because on the same Macbook, Snow Leopard works fine, Leopard works fine, heck even Windows Vista and Windows 7/8 work fine. Only Mac OS X 10.7 Lion, is having issues. Thus I repeat one more time:

     

    TL;DR

    Apple screwed something up and apparently won't fix it, quit making excuses.

    Can you share which routers and hardware/firmware versions you have problems with?  That might help others understand that their combination may present problems like yours has. 

     

    I know it's a pain, but the "standards" really are the issue.  There tons of router manufacturers, and not all of them have "perfect" software running on their routers.  They are fixing it continuously, and unfortunately, they don't have auto update procedures that just install/fix bugs for you.  People just don't seem to understand the importance of updating router firmware.  There are many router manufactures using Linux to do the "router" controls for them.  It's very capable and has the right stuff.  But, there are still bugs, new features and drivers that need to be managed, it's software.   The consumer holds the burden, unfortunately, of doing the updates.

     

    Buying a new "router" doesn't always create a better situation, because the newest routers always seem to have the most opportunity to have out of date software in them.   Only the Apple routers that I have purchased have ever had the "newest" firmware in them (and not all of those did, but the airport management software tells you about it and you just click to fix it).  Netgear, Linksys/Cisco, ubnt.com and others have always needed to have a firmware update done. 

     

    Many of them now provide a "setup CD" that will automate the update for you.  If you don't use that CD (and many people don't because of the notorious adware problems with them), you need to do the update yourself. 

     

    If you don't like having to update your routers firmware and hate the incompatibiilty issue, you might spend some time crying on your router manufactures shoulder too.  They share at least half the blame for these kinds of problems.  If they've updated their firmware, they shipped it before with bugs, and that's a checkbox in the "bad product" box for me.

  • rvjacobs Level 1 Level 1 (0 points)
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    Feb 4, 2013 11:33 AM (in response to lhale)

    Hello you all,

     

    I also had the problem of a disconnecting wifi while my imac was sleeping. I did not have the reconnecting issue after sleep, but the lost connection issue during sleep which made it impossible to reach my imac for things like homesharing, apple tv or remote desktop. I have a late 2012 iMac with a clean ML 10.8.2 on it and wirelessly connected to an apple time capsule (same as an airport extreme). My partner has a mid 2007 iMac, also with an ML 10.8.2 on it.

     

    I tried every single solution I could find on the internet, such as changing the router's security from wpa2 to wpa, changing the MTU from automatic to manual 1453, router reboots, re-installations, re-configurations, keychain clean-ups, everything.

     

    Eventually I solved my problem with these steps and now it works as a charm. I can still find the iMac with the remote app, even after 12 hours of sleep:

     

    My time capsule router is set on automatic MTU and encrypted with WPA2 and I use  the 5Ghz network!

    1. Cleaned all the wifi passwords in keychain on my iMac

    2. Created a new network location in system preferences

    3. In this location I deleted the bluetooth pan and bluetooth dun connection.

    4. In this location I changed the preferred connection-order to wifi on #1 and ethernet on #2.

    5. Restarted my iMac.

     

    Now I still have a connection when it sleeps and I can wake it to low profile using the remote app (homesharing) and everything works fine.

     

    Hope more people wille be helped by this.

  • rvjacobs Level 1 Level 1 (0 points)
    Currently Being Moderated
    Feb 4, 2013 11:34 AM (in response to lhale)

    Hello you all,

     

    I also had the problem of a disconnecting wifi while my imac was sleeping. I did not have the reconnecting issue after sleep, but the lost connection issue during sleep which made it impossible to reach my imac for things like homesharing, apple tv or remote desktop. I have a late 2012 iMac with a clean ML 10.8.2 on it and wirelessly connected to an apple time capsule (same as an airport extreme). My partner has a mid 2007 iMac, also with an ML 10.8.2 on it.

     

    I tried every single solution I could find on the internet, such as changing the router's security from wpa2 to wpa, changing the MTU from automatic to manual 1453, router reboots, re-installations, re-configurations, keychain clean-ups, everything.

     

    Eventually I solved my problem with these steps and now it works as a charm. I can still find the iMac with the remote app, even after 12 hours of sleep:

     

    My time capsule router is set on automatic MTU and encrypted with WPA2 and I use  the 5Ghz network!

    1. Cleaned all the wifi passwords in keychain on my iMac

    2. Created a new network location in system preferences

    3. In this location I deleted the bluetooth pan and bluetooth dun connection.

    4. In this location I changed the preferred connection-order to wifi on #1 and ethernet on #2.

    5. Restarted my iMac.

     

    Now I still have a connection when it sleeps and I can wake it to low profile using the remote app (homesharing) and everything works fine.

     

    Hope more people wille be helped by this.

  • mgranger Calculating status...
    Currently Being Moderated
    Feb 6, 2013 3:29 AM (in response to lhale)

    I tryed many of suggestions on my 2010 iMac. No issue on my MBA2012, but no solution on the iMac.

     

    This is definitively a BUG FROM APPLE in mountain lion and this is incredible that Apple does not profide a fix.

     

    Without fix I will go to linux or Windows.........

  • gphonei Level 1 Level 1 (0 points)
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    Feb 6, 2013 5:32 AM (in response to mgranger)

    mgranger wrote:

     

    I tryed many of suggestions on my 2010 iMac. No issue on my MBA2012, but no solution on the iMac.

     

    This is definitively a BUG FROM APPLE in mountain lion and this is incredible that Apple does not profide a fix.

     

    Without fix I will go to linux or Windows.........

    Can you share what brand of wireless router you are using and what model number it is?  That might help others find information about the same combination of issues.

  • mgranger Level 1 Level 1 (0 points)
    Currently Being Moderated
    Feb 6, 2013 6:48 AM (in response to gphonei)

    Very specific as I am in France. I am using a FREEBOX v6 router (from my internet provider). In the french forums there are a lot of people with this problem, with different routers. This is why this is a problem with ML. I have no issue with Iphoes, Windows, Ipad and the problem arrived when I upgrade my iMac 2010 from 10.7.x to ML (not on my MBA???).

  • CT Level 6 Level 6 (14,995 points)
  • gphonei Level 1 Level 1 (0 points)
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    Feb 6, 2013 7:01 AM (in response to mgranger)

    mgranger wrote:

     

    Very specific as I am in France. I am using a FREEBOX v6 router (from my internet provider). In the french forums there are a lot of people with this problem, with different routers. This is why this is a problem with ML. I have no issue with Iphoes, Windows, Ipad and the problem arrived when I upgrade my iMac 2010 from 10.7.x to ML (not on my MBA???).

    Many people with ISPs that lock them into a specific router and don't upgrade firmware seem to have problems which, in the end, are fixed by getting upgraded firmware.

     

    I can't stress enough how many issues/items of compatibility have to be right for this stuff to work.

     

    You should not unterestimate the complexity of developing a correct wireless product.

     

    If you have ethernet ports free, I would be very tempted to go buy a new WiFi router/radio that is capable of providing a wireless bridge to a wired network.  The Apple airport express can do this.  But, also, just finding another wireless router to test with, might be a good thing.  If you have another wireless router, you can turn off DHCP on it, and insert a cable into one of its LAN ports and plug the other end into one of your ethernet ports on your FreeBox.   Then, it will provide a wireless signal, and DHCP and internet traffic will go over to the freebox.

     

    Apple is only really supporting 802.11n and WPA2, the latest and greatest standards.  If your router doesn't do those right, or at all, then you will see problems it seems.

     

    I know it sounds like Apple needs to fix something, but if they are correctly supporting the standards, it's hard to find fault anywhere but with the older, out of date equipment.

  • Happel Calculating status...
    Currently Being Moderated
    Feb 6, 2013 7:23 AM (in response to gphonei)

    Apple is only really supporting 802.11n and WPA2, the latest and greatest standards.  If your router doesn't do those right, or at all, then you will see problems it seems.

    Blah blah, tried all combinations of wireless standards and security types on three different routers (tp-link, linksys, cisco), has no influence whatsoever. Sometimes it seems to work for 15 minutes, but eventually the disconnection problems always return.

     

    I know it sounds like Apple needs to fix something, but if they are correctly supporting the standards, it's hard to find fault anywhere but with the older, out of date equipment.

    I don't know and I don't care if they are correctly following the standards, all I know is that my macbook works perfectly fine on Leopard, Snow Leopard and on all flavours of windows that will run on it, but not on OS X Lion. And since Apple makes OS X, they are the ones that have to fix it. They probably won't, but they should.

  • gphonei Level 1 Level 1 (0 points)
    Currently Being Moderated
    Feb 6, 2013 11:42 AM (in response to Happel)

    Happel wrote:

     

    Apple is only really supporting 802.11n and WPA2, the latest and greatest standards.  If your router doesn't do those right, or at all, then you will see problems it seems.

    Blah blah, tried all combinations of wireless standards and security types on three different routers (tp-link, linksys, cisco), has no influence whatsoever. Sometimes it seems to work for 15 minutes, but eventually the disconnection problems always return.

    I personally have never had good luck with tp-link, nor with linksys, since cisco bought them.  Cisco, for me, is also a non-starter, because they just don't know how to create products that just work.  They make their money off of support contracts and product replacement/upgrade cycles.

     

    Can you provide specific model information for which of the above that you have tried?   That would certain help people searching here, to find conversations that will point them at combinations which don't work well together.

     

    I'm not trying to suggest that Apple has no responsibility to fix problems.   I'm just trying to point out, that they have little desire to "support" other peoples products, and that places them in a position to point the finger at the standards and ask "who is not meeting this?"

    I know it sounds like Apple needs to fix something, but if they are correctly supporting the standards, it's hard to find fault anywhere but with the older, out of date equipment.

    I don't know and I don't care if they are correctly following the standards, all I know is that my macbook works perfectly fine on Leopard, Snow Leopard and on all flavours of windows that will run on it, but not on OS X Lion. And since Apple makes OS X, they are the ones that have to fix it. They probably won't, but they should.

    The primary issue between Leopard/Snow and Lion/Mountain, is the movement to the preferences of 802.11n with WPA2 security as the default/supported network.  The reason behind that is most likely related to airplay.  On my local networking equipment, 802.11g or 802.11n on 2.4ghz will not do airplay reliably.  But with 802.11n on 5Ghz, it is quick to start and pause free during playback.

     

    I understand that you are wondering why you have to spend more money.  I'm trying to help you reflect on the fact that you've already spent a lot of money, and there is a lot of capabilities that you are missing out on, perhaps, because your router/network is not compatible with what the equipment is expecting.  Like it or not, that's where you are at.  More changes in WiFi are coming this year, and new standards are going to make new equipment, and firmware updates hit the shelves.  This particular issue, is not going to be a "once" thing.  You are going to get to experience this over and over, and new equipment and software comes out, with more bugs that need to be fixed.

  • Vanslacker Calculating status...
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    Feb 8, 2013 10:14 AM (in response to Harpo Marx)

    Just wanted to say thanks !!  Your solution worked great for me. 

  • tfresca Level 1 Level 1 (0 points)
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    Feb 28, 2013 7:16 PM (in response to lhale)

    In 145 pages but I'm sure it's been mentioned before but I'm running 10.6.8 and started having these problems out of the blue, always having to turn off then turn back on my airport. I don't want to jinx it but I lowered my mtu to 1400 from 1500 and that seemed to fix it. I'm 24 hours without a drop. I tried all the other fixes I saw mentioned. I'll update if my problems start up again.

  • SandemanvdV Calculating status...
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    Mar 4, 2013 10:42 AM (in response to lhale)

    Hi all,

     

    Same problem here. Wifi worked fine but the last two months it is a little disaster. Wifi drops several times per hour only on my iMac. Renew DHCP lease is the workaround. Had the problem with previous ADSL provider and modem and it continues with my new ADSL provider with another modem. My daugther with a MacBook has no problems, iPhone's, iPads work fine. Only my iMac from 2011 has the problem but why? Running Moutain-Lion with all the updates.

     

    Dear Apple please provided an solution because like this I almost start to think that W8 is back a beter solution. Can't image that I wrote that!!!! Have Wifi diagnostic run so if needed I can provide more details.

     

    Sander

  • gphonei Level 1 Level 1 (0 points)
    Currently Being Moderated
    Mar 5, 2013 7:48 AM (in response to tfresca)

    tfresca wrote:

     

    In 145 pages but I'm sure it's been mentioned before but I'm running 10.6.8 and started having these problems out of the blue, always having to turn off then turn back on my airport. I don't want to jinx it but I lowered my mtu to 1400 from 1500 and that seemed to fix it. I'm 24 hours without a drop. I tried all the other fixes I saw mentioned. I'll update if my problems start up again.

    This is usually attributable to your ISP having an oddly configured routing setup in their device.  But also, look around for references to the Nagal algorithm which can contribute to this problem by creating delays for the last packet out in a stream.  In some cases when timers are set too short, or otherwise not compatible with what is happening realistically, the delay can cause buggy software to ignore the last packet and this will result in DHCP data not being delivered correctly etc.

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