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Lion WiFi Connection Problem

667578 Views 2,669 Replies Latest reply: Apr 20, 2014 7:29 AM by AleDeC RSS
  • gphonei Level 1 Level 1 (0 points)
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    Jan 9, 2013 1:40 PM (in response to mymatelee)

    mymatelee wrote:

     

    Hi all,

     

    I have 3 MacBook Airs and all had this f@@@@g problem

     

    I had a netgear and linksys router and still problems.

    Can you share the model of these, and what version of firmware is in them?  That might help others identify which equipment they might also have this problem with.  Also, did you ever update the firmware in these routers?

    Then I thought to myself, Apple are so secretive they don't test these things outside of there own building.

     

    So... I purchased an Airport Extreme and hey presto the MacBook Air now works  perfectly fine.

    Now, they probably don't test with everyone elses devices.  They do, probably, do the best they can, to validate compatibility with the published standards.

     

    As we've seen here, others have had different and many times better results after updating the firmware in their routers.

     

    As I've said before, your router is a computer.  Many companies are using the Linux operating system in there routers to take advantage of a network stack which has already be "created" and "debugged" by a wide range of users.  But, that also means, that they didn't write the whole thing, and thus there may be "problems" in the software, which they don't know the basis/cause/history thereof.

     

    I understand your frustration, but lashing out like this is really a blind move.  You have nothing to substantiate who's software is "wrong", only that something was "incompatbile" and kept OS-X from connecting to your routers.

    One thing to note is when my washing machine is on it doesn't work, probably interference.

    That is an interesting issue.  If there is interference, it would probably be because of a grounding/power system problem.  Do you have a UPS on your router now?  If not, you might try putting one on it.  If so, does the problem go away if you unplug the UPS from the wall so that the power system is not coupled to the router?  If it's still there with the UPS disconnected, I'm at a loss to explain.  The washing machine would have to be generating a wide spectrum electromatic noise associated with a bad grounding system, or something along those lines.  In that case, I'd give serious thought to have a professional electrician come in and take some measurements and do some analysis of what is going on.  You could end up being electrocuted, or a needed GFI not working in a water based electrical accident.

    Also change your MTU to 1300 which is the same as a VPN connection..

    This should not be a necessary thing, except when there is, in fact, a bug in a router's implementation of the nagle algorithm.  Nagle's algorithm - Wikipedia, the free encyclopedia

    This has caused me no end of trouble and heartache....

     

    Hope this helps....

     

    In boot camp change your MTU to 1300 too.

     

    Total P.O.S.

    It sounds like you made lots of changes all over the place trying to find something that works.  That's exactly what is the worse thing you can do.  I know it's hard to understand what to do as a consumer.  It sounds like things are working now.

     

    Did you change the MTU before or after getting the Airport Extreme?  It really should not be necessary.

  • norgard Calculating status...
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    Jan 9, 2013 1:41 PM (in response to mymatelee)

    that's odd that your washing machine doesn't work...

  • mymatelee Level 1 Level 1 (0 points)
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    Jan 9, 2013 3:06 PM (in response to gphonei)

    Thanks for Your input but i threw the routers in the bin.  Yes i did update the firmware. I think both routers were G rated and the Netgear was a White and the Linksys was Blue with two aerials, sorry don't know models.

     

    I'm not lashing out at all, the £2000 laptop i bought just doesn't connect to WIFi other than my Airport Extreme.  Pretty pathetic when my daughters toy laptop can connect no problem.

     

    The MTU is back to default in Lion but I have to keep it at 1300 in Bootcamp..

     

    I'm just happy it now works..

     

    My GF says its like a pair of Jimmy Choo shoes, expensive, looks great but utterly impractical. Ha ha

  • mymatelee Level 1 Level 1 (0 points)
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    Jan 9, 2013 3:14 PM (in response to mymatelee)

    Just to note, I have a iMac27, Mac Pro, White iMac, iPad, IPad 2, iPad Retina, iPad Mini, IPhone 4s &  5 with no problem connecting.

     

    Had problems connecting Retina Mac Book Pro 15( Mountain lion) & MacBook Air (Lion).

     

    Strange. Hope they come up with a fix as I need the wifi in Starbucks to work.

  • gphonei Level 1 Level 1 (0 points)
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    Jan 9, 2013 3:43 PM (in response to mymatelee)

    mymatelee wrote:

     

    Just to note, I have a iMac27, Mac Pro, White iMac, iPad, IPad 2, iPad Retina, iPad Mini, IPhone 4s &  5 with no problem connecting.

     

    Had problems connecting Retina Mac Book Pro 15( Mountain lion) & MacBook Air (Lion).

     

    Strange. Hope they come up with a fix as I need the wifi in Starbucks to work.

    In places like that, you might actually have luck using the MTU change that was mentioned in the previous post. Changing the MTU helps with commercial routers in restaurants which are known, apparently, to have bad Nagle Algorithm problems for certain versions.  Cisco, and a couple of other long existing companies have their own network stacks which have been around for quite some time.  Everyone else seems to be using some version of Linux on small "PC" devices that they sell as "routers".  It's all of those variations which can make the problem intractable, for Apple (or anybody with wireless equipment in their product line), to solve.  You just have to get reports of the problem, with the equipment known, and then go buy/aquire the equipment and do the testing.

  • lauhub Level 1 Level 1 (0 points)
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    Jan 11, 2013 4:18 PM (in response to gphonei)

    Hi,

     

    I have not the same problem, but my brother has it.

     

    The "funny" thing is that he has the same MBA as me, with the same version of Lion:

    • When he connects to his Wi-Fi, it does not work, the wi-fi icon is cycling and it is unable to connect to internet.
    • When I connect to his Wi-Fi with my own MBA, everything works perfectly.

    Of course, we checked all the parameters. No difference, nothing. He told me that is Wi-Fi worked in other places so I think it is voodo or we shall exorcise is NetGear router !

     

    I did not read the 170 pages (wow !) of this topic to see if what I propose has already been proposed. So I propose it now .

     

    If everyone of us opens a bug at https://bugreport.apple.com it will be visible by Apple. I recently had a problem with Lion and Time Machine. A topic was very active and many of the participants opened a bug. A few weeks later, we had a Supplemental Update that corrected the problem.

     

    So, let us all open a bug report ! (and make some voodo or incantations)

  • roxan Level 1 Level 1 (0 points)
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    Jan 12, 2013 12:06 AM (in response to lauhub)

    You wrote:

    > The "funny" thing is that he has the same MBA as me, with the same version of Lion:

    > When he connects to his Wi-Fi, it does not work, the wi-fi icon is cycling and it is unable to connect to internet.

    > When I connect to his Wi-Fi with my own MBA, everything works perfectly.

     

    Did you both upgrade to ML from Lion?

    Did yo both have an ongoing DHCP lease for that specific wifi network before the upgrade?

     

    Ph.

  • CT Calculating status...
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    Jan 12, 2013 7:02 AM (in response to lauhub)

    Can't confirm.

  • snipjo Level 1 Level 1 (0 points)
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    Jan 12, 2013 7:26 AM (in response to gphonei)

    Since updating router firmware no wifi drop, as well after switching to g mode. Thanks for the guidance and support to date, hopefully it now last for this case !!! Will keep all posted if problem come back.

  • gphonei Level 1 Level 1 (0 points)
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    Jan 12, 2013 8:28 PM (in response to roxan)

    roxan wrote:

     

    You wrote:

    > The "funny" thing is that he has the same MBA as me, with the same version of Lion:

    > When he connects to his Wi-Fi, it does not work, the wi-fi icon is cycling and it is unable to connect to internet.

    > When I connect to his Wi-Fi with my own MBA, everything works perfectly.

     

    Did you both upgrade to ML from Lion?

    Did yo both have an ongoing DHCP lease for that specific wifi network before the upgrade?

     

    Ph.

    Okay, these kinds of cases point out that there can be percularities that are hard to judge the cause thereof.

     

    Some things to check is exact placement of your lap top vs his.  RF is odd, and signal levels are particular when interference is involved.  The other thing, is that if there was a WiFi radio problem fixed by Apple, your computer may have the fixed hardware. 

     

    Do you know how to use the WiFi diagnostics?  You need ot hold down Option and click on your wifi icon and select "Open WI-FI Diagnostics".  Run the test and see what it tells you about why it is disconnecting, or can't connect.

  • clivefromess Calculating status...
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    Jan 15, 2013 5:40 AM (in response to gphonei)

    Have had all the sillies like the wifi dropping when I pause in any work, the wifi dropping when left for a time.  

    Solution suggested on another forum, and it seems to work until Apple rouse themselves and do somthing to fix the issue for their premium paying customers, is to install from Apple Store the free download of "Caffeine", a small app which keeps the MAC awake.

    For me this has resulted in the wifi working when I leave the device and remaining on good and steady.   Not the most sophisticated solution but until Apple as a Company wake u and do something this can save a lot of aggro.

  • gphonei Level 1 Level 1 (0 points)
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    Jan 15, 2013 9:10 AM (in response to clivefromess)

    clivefromess wrote:

     

    Have had all the sillies like the wifi dropping when I pause in any work, the wifi dropping when left for a time. 

    There did use to be a problem coming out of "sleep".  That was fixed last year some time.  Are you still having this problem, or is this just what you did at that time to work around the issues which Apple fixed?

  • clivefromess Level 1 Level 1 (0 points)
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    Jan 15, 2013 9:21 AM (in response to gphonei)

    After a recent upgrade the iMac the wifi starting dropping unexpectedly.   Also I had changed to a new router recommended by my ISP.   Had gone through all the likely problems, resetting channel of use, etc.   Tried various solutions suggested on the forums with no success, until I came across this Caffiene app route, which seems to work.

    The Mac is always kept up to date for security reasons etc. but these updates sometimes cause more problems than they resolve.   Similarly last Sunday the Face Time started to throw up an error message, and the forums show that this is not only my problem, but have a different way of opening that app. which most times allows it to function, but this is going off track.

    If you have another, not too technical, means to fix the wifi I would be pleased to read it.  Thank you for your response.

  • lauhub Level 1 Level 1 (0 points)
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    Jan 16, 2013 8:26 AM (in response to roxan)

    roxan wrote:

     

    Did you both upgrade to ML from Lion?

    No, only my brother's MBA was installed with Lion, upgraded to ML then downgraded to Lion.

     

    Did yo both have an ongoing DHCP lease for that specific wifi network before the upgrade?

     

    No, my brother went to this wifi network a few months after Lion re-install.

  • gphonei Level 1 Level 1 (0 points)
    Currently Being Moderated
    Jan 16, 2013 8:56 AM (in response to clivefromess)

    clivefromess wrote:

     

    After a recent upgrade the iMac the wifi starting dropping unexpectedly.   Also I had changed to a new router recommended by my ISP.

    Did you make sure that this new router had the latest available firmware in it?  When the software in the router in broken, it doesn't matter what settings you try, in some cases, because there will be problems in the software which keep other features from working.

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