Skip navigation

Wifi Constantly Dropping in Lion

522565 Views 2,266 Replies Latest reply: Mar 28, 2014 2:35 AM by WSR RSS Branched to a new discussion.
  • KBN007 Calculating status...
    Currently Being Moderated
    Oct 15, 2011 8:26 AM (in response to lhale)

    I have an iMac, two iPads, an new Apple TV and some other equipment that normally connects very well to my wireless network by using an Airport Extreme, but after upgrading to Lion on the iMac the whole wireless network has become extremely unstable and 9 out of 10 times we cannot connect to the network and I have needed to started using a cable for the Apple TV, but for the rest of the equipment I have no solution and it has become useless while at home !

     

    And yes of course I have tried all the usual stuff with turning off/on and removing wireless access authentication etc.. But NO I'm not going to patch and twist the drivers etc. I expect nice expensive products from Apple to

    be working without have to do all the usual ****** Microsoft patching and tweeking and rebooting!

     

    BTW I have also updated to 10.7.2 and it unfortunately doesnt help at all.


    I BTW REALLY MISS AN OFFICIAL STATEMENT FROM APPLE IN RELATION TO THESE SERIOUS PROBLEMS !!!

     

    These problems are ruining the whole concept of wireless equipment like Ipad's etc...

     

    Please advice since I'm desperate to get it running again...

  • mampo Calculating status...
    Currently Being Moderated
    Oct 15, 2011 9:21 AM (in response to wifiguru)

    Hi Wifiguru,

     

    no, it is not the ISP, as when I had the dropouts I could neither reach the local network printer nor the gateway.

    When scanning the neibourhood, I cannot see competing wifi networks on same/close channels.

    Everything seems fine.

     

    The only thing to note is that in my setup, Lion and the new MBP seem to have a lot more trouble with lower reception than my old MBP with SL and my work laptop with WIN XP and my ipod touch and my wife's iPhone.

     

    But it definitely got better during the last seeds. Not perfect, but better.

    All the PRAM, network setting deletion, re-installing Lion etc. solutions did not work in my case.

     

    All the best

     

    Martin

  • wifiguru Level 2 Level 2 (230 points)
    Currently Being Moderated
    Oct 15, 2011 1:06 PM (in response to mampo)

    Have you tried taking the machine to an Apple Store and getting it checked out ? maybe you have a hardware issue or poorly connected antenna cables or something.

  • acidking Level 1 Level 1 (85 points)
    Currently Being Moderated
    Oct 15, 2011 1:19 PM (in response to lhale)

    I am still on Leopard 10.6.7 (refusing to upgrade :P), wifi drops ALL THE TIME ever since I bought it last year. Is this typical with Apple? I've dug up the internet for answers and tried many things, but nothing resolves the problem.

     

    On thing I didn't try though, I've read somewhere that deleting the airport plist file solved the problem for someone, but couldn't find this file, I know it doesn't turn up in search or spotlight, anyone knows where it is?

  • Froggy Grodkin Calculating status...
    Currently Being Moderated
    Oct 15, 2011 1:36 PM (in response to wifiguru)

    Since my last post I have made repeated attempts to resolve this issue.

    Constantly referring to this thread and the others that abound on this subject, thanks to all the knowledgeable folk contributing, I have learned much about Wi Fi.

     

    After each of several seemingly successful solutions a waiting period of usually 5 to 8 days or so has revealed these ‘fixes’ to be short lived.

     

    I am reluctant to ‘blow the trumpet’ announcing a resolution but hopefully my Wi Fi connection which has been drop free for 14 days will remain that way, could it be the ‘final solution’?

    The directions given in this Thread for completely removing all vestiges of prior Wi Fi set ups including Keychain items, then resetting the devices to ‘factory’ settings before starting afresh. In fact I did this twice in succession before this latest ‘solid’ connection was made.

     

    Because I feel they can be justified by probably being of some help to fellow sufferers there are a few questions:

     

    Is there a document that you can point to which details what and why the various readings should be, or can someone detail the information?

     

    In particular there has been little mention of Transmit Rate/s, can anyone advise how these fit into the equation?

     

    Thanks again to the major contributors in this Thread, your efforts are truly appreciated.

     

    The TX Rate has been as high as 130 and the Signal as good [?] as -42. The noise can be worse when a neighbour comes on line and I am in the process of changing channels to get as far away for him/her as possible. Unfortunately that neighbour is also changing channels.

    I seem to have issues using the higher numbered Channels, e.g. 13 cannot be used as the connection cannot be made. Things improve very gradually as the Number of Channel chosen descends, 6 to 1 are fully functional.

     

    The following has been captured:

     

    From Terminal input - /System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport -I -s


    This was with the Devolo W Lan activated as an access point-Ethernet connection [The Devolo was purchased to enable iPhone Wi Fi connection from a remote garage]:

     

    agrCtlRSSI: -51

         agrExtRSSI: 0

        agrCtlNoise: -91

        agrExtNoise: 0

              state: running

            op mode: station

         lastTxRate: 54

            maxRate: 54

    lastAssocStatus: 0

        802.11 auth: open

          link auth: wpa2-psk

              BSSID: 0:b:3b:73:53:bf

               SSID: ??????????

                MCS: -1

            channel: 1

     

    This is with the Devolo deactivated:

    agrCtlRSSI: -59

         agrExtRSSI: 0

        agrCtlNoise: -92

        agrExtNoise: 0

              state: running

            op mode: station

         lastTxRate: 78

            maxRate: 130

    lastAssocStatus: 0

        802.11 auth: open

          link auth: wpa2-psk

              BSSID: 0:1c:df:a1:b9:5c

               SSID: ??????????

                MCS: 12

            channel: 1

     

     

    From Menu Bar Wi Fi Icon Right Click dropdown:-


    ??????????

    PHY Mode: 802.11g

    BSSID: 0:b:3b:73:53:bf

    Channel: 1 (2.4 GHz)

    Security: WPA2 Personal

    RSSI: −47

    Transmit Rate: 117

    MCS Index: 14

     

    With Devolo deactivated:

     

    RSSI: −58

    Transmit Rate: 39

    MCS Index: 10

     

    All of the above readings seem to fluctuate steadily regardless of actual set up.

     

    From Wi-Fi Diagnostics.app:-

      Screen Shot 2011-10-15 at 19.44.22.jpg

     

    This is with the Devolo deactivated [probably the above is using the Wi Fi aspect of the Devolo?]

    Screen Shot 2011-10-15 at 20.53.04.jpg

    My 'computer room' [read small spare bedroom minus bed] is at present being refurbished.

    By design it houses the main telephone connection.

    The Mac is presently set up in a location where the signal has to pass through 2 brick walls each of which has timber studding and plasterboard facings.

     

    My kit is:-

    Mac Pro Early 2008 2 x 2.8 GHz 4 Core Xenon 8 GB RAM Mac OS X Lion 10.7.2 with Applications on Velociraptor 50% full.

    Data on a separate HDD less than  50% full. Time Machine running on a Drobo x 4 HDD stack. Other BackUps on various Internal and external HDDs. Clones of Snow Leopard and Lion 10.7.0 [Lion only nil apps - tests on this made absolutely no improvement compared to full set up] on separate HDDs.

    Modem Router - Belkin Vision N1

    Time Capsule [first generation] with original Leopard TM backup [Time to ditch this?], the Airport Extreme of which has been set up as the Wi Fi base but proved more problematic than the present set up.

     

    Whilst I would like the Wi Fi to perform as well as possible it is not essential until I purchase an iPad 3 [a clue to the time scale perhaps] or a MacBook Pro/Air/or? My concern is having to go through all this again later.

    Any comments or suggestions, with regard to further action, are most welcome.

     

    Best regards,

     

    Frog

  • Froggy Grodkin Level 1 Level 1 (20 points)
    Currently Being Moderated
    Oct 15, 2011 1:53 PM (in response to acidking)

    Hi acidking

     

    'com.apple.airport.airportutility.plist‘ can be found at:

     

    Click on “your Home Directory” > Go [in the top Menu Bar] > Go to Folder > type in Library and hit Go

     

    When the Library opens the plist is in the usual place > Preferences

     

     

    For future simple access to the Library simply drag the Library Folder to Finder‘s Side Bar, you are then only one click away [from the Library that is]

     

    HTH

    Mac Pro Early 2008 8 Core RAM 8GB , Mac OS X (10.7.1), Best regards, FROG
  • acidking Level 1 Level 1 (85 points)
    Currently Being Moderated
    Oct 15, 2011 2:06 PM (in response to Froggy Grodkin)

    Thanks, I backed it up and removed it.

     

    Also for sake of trying I removed from System/Library/LaunchDaemons:

    com.apple.airportPrefsUpdater.plist

    com.apple.airport.wps.plist

    com.apple.airportd.plist

     

    And from System/Library/LaunchAgents:

    com.apple.AirPortBaseStationAgent.plist

     

    Now I'll just see what happens. If I don't report back here it means I haven't had problems yet

    MacBook Pro 17, Mac OS X (10.6.7)
  • moreno@milan Calculating status...
    Currently Being Moderated
    Oct 16, 2011 2:23 AM (in response to KBN007)

    I've got the same problem after a complete reinstallation of Lion. The OS was automatically updated to 10.7.2. but WiFi doesn't works. I can see the power of signal but it doesn't works! It worked before when I did the update from Snow leopard after 10.7.1 update. But now that I've  formatted the sistem, with 10.7.2 it seems broke again!

    Anyone knows why?

    Many Thanks

  • acidking Level 1 Level 1 (85 points)
    Currently Being Moderated
    Oct 16, 2011 7:45 AM (in response to acidking)

    acidking wrote:

     

    Thanks, I backed it up and removed it.

     

    Also for sake of trying I removed from System/Library/LaunchDaemons:

    com.apple.airportPrefsUpdater.plist

    com.apple.airport.wps.plist

    com.apple.airportd.plist

     

    And from System/Library/LaunchAgents:

    com.apple.AirPortBaseStationAgent.plist

     

    Now I'll just see what happens. If I don't report back here it means I haven't had problems yet

    Ok (I had a feeling I was going to report back) ... basically DO NOT delete the files in LaunchDaemons or LaunchAgents I've restored them as I've had problems after restarting (eg. wifi won't turn off, won't connect), but it actually worked well all night without dropping ... thus I think deleting only the plist file com.apple.airport.airportutility.plist in [user]/Library/Preferences is what did the trick.

    MacBook Pro 17, Mac OS X (10.6.7)
  • moreno@milan Level 1 Level 1 (0 points)
    Currently Being Moderated
    Oct 16, 2011 8:30 AM (in response to acidking)

    Hey man, why did you remove your las post?

  • josiasingh Calculating status...
    Currently Being Moderated
    Oct 16, 2011 10:15 AM (in response to lhale)

    I had the same problem, but i updated to 10.7.2 and haven't had the problem anymore.

    try system update

  • Abhishek S Calculating status...
    Currently Being Moderated
    Oct 16, 2011 10:15 AM (in response to lupunus)

    i really do not think so that 10db should be execuse for dropping connection. Whey did Snow Leo had no problem. Only thing changed was, i upgraded to migthy Lion. iPad is communitcating good - tested for long time. Connection may become slow, may retry more (10db == 10 times), it must not drop connection.  When it works it gives good speed - just drop-off often. Signal is similar. On the same location PC has better strenth with my Cisco Linksys (on G radio) Also i understand that can be different for different make. iMac is just 8 kid steps away for express and slighly off-line. Showing such low strenght is another problem. Airport Xpress is transmitting @ full power.

  • lupunus Level 3 Level 3 (995 points)
    Currently Being Moderated
    Oct 16, 2011 11:50 AM (in response to Abhishek S)

    Abhishek S wrote:

     

    i really do not think so that 10db should be execuse for dropping connection.

    Real world examples for 802.11g wireless.

     

    An SNR of 30 dB, for example, may allow an 802.11g client radio and access point to communicate at 24 Mbps; whereas, a SNR of 15 dB may only provide for 6 Mbps.

     

    • > 40dB SNR = Excellent signal (5 bars); always associated; lightning fast.
    • 25dB to 40dB SNR = Very good signal (3 - 4 bars); always associated; very fast.
    • 15dB to 25dB SNR = Low signal (2 bars); always associated; usually fast.
    • 10dB - 15dB SNR = Very low signal (1 bar); mostly associated; mostly slow.
    • 5dB to 10dB SNR = No signal; not associated; no go.
  • benjamin239 Calculating status...
    Currently Being Moderated
    Oct 16, 2011 2:51 PM (in response to lhale)

    I think that I have figured out what is going wrong in my case at least.

    The router (a NETGEAR for me, 2.4GHz-G), is sending a disassociate packet to my mac (iMac 21", extremely new) while the mac is sleeping. While the mac is asleep, I don't think it disassociates correctly, or doesn't disconnect completely, because when I get back to my computer, it says that it is connected, shows all the other networks in the region, but cannot connect to any network resources or the internet.

     

    I assume that the router is sending the disassociation packet because my computer hasn't used network resources for a time, but since while I'm at the computer, it usually is doing something with the internet, I have never experienced the problems begin except when waking from a long period of sleep. I think this is true because if I put my computer to sleep and wake it back up several minutes later, everything is fine.

     

    I believe that if you could get the router to stop sending the disassociation packets, the connection would work fine.

     

    I am now going to try to see if the problem would occur with the computer not in use, but never going to sleep.

  • gsspike Level 1 Level 1 (0 points)
    Currently Being Moderated
    Oct 16, 2011 3:13 PM (in response to lhale)

    So far so good niether MacBook has acted up since upgrading to 10.7.2 this week.

1 ... 50 51 52 53 54 ... 152 Previous Next

Actions

More Like This

  • Retrieving data ...

Bookmarked By (82)

Legend

  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.