Wifi problems

Discussion in 'OS X El Capitan (10.11)' started by limonair, Apr 17, 2016.

  1. limonair macrumors newbie

    limonair

    Joined:
    Apr 17, 2016
    #1
    Hello,

    I am having troubles with wifi since my clean install of El Capitan 10.11.4 on my MacBook Pro 9,1 (15" mi 2012).

    I can connect sometimes to my wifi router but the connection is not staying. A ping in the Terminal show regularily no route to host or very long response time.
    When I try to disconnect and connect again to the wifi, I can't (impossible to connect).
    I tried on another router, or with my phone connection shared via wifi, same behavior.

    I tried several things to fix the problem:
    > reset PRAM
    > reset SMC
    > deleted networking preferences and recreated them
    > deleted files in /Library/Preferences/SystemConfiguration/, rebooted and try to connect again (solves the problem temporarily)
    > disabled bluetooth
    > disabled ADWL

    I am desperate, I don't know what to do else to fix my problem !

    Any advice ?
     
  2. benthewraith macrumors 68040

    benthewraith

    Joined:
    May 27, 2006
    Location:
    Miami, FL
    #2
    This is an ongoing problem and it looks like it's the WiFi driver crashing. People have been experiencing it since launch of El Capitan last year. We can only hope Apple provides a fix. As someone who beta'd the 10.11.4 beta, nothing ever got fixed. The driver doesn't crash on Windows from experience. I'm testing the 10.11.5 beta, and although the issue still occurs, turning WiFi on and off resolves the problem where it didn't used to.
     
  3. limonair thread starter macrumors newbie

    limonair

    Joined:
    Apr 17, 2016
    #3
    I thought I was almost alone in this case but you seem to say that we are several people in the same case.

    What solution do we have ?
    Reinstall Yosemite ? I will try this soon...
     
  4. limonair thread starter macrumors newbie

    limonair

    Joined:
    Apr 17, 2016
    #5
    I already tried everything on this page with no result...

    Yesterday I installed Yosemite (10.10.5) from scratch on a second disk I have in my mac, the connection to the wifi network is ok but the connection is not stable (a single ping on a website for 200-300 packets lost between 10 and 20% of the packets...).

    Another thing I noticed is that I cannot be far from the wifi router or the connection is lost. Only in the same room where before I was able to go in other rooms (5 meters through walls max) with only a smaller speed on the connection.
    I really don't understand this... It seems like an hardware problem now ! Or am I crazy ?
     
  5. richard2 macrumors regular

    richard2

    Joined:
    Oct 21, 2010
    Location:
    England, United Kingdom
    #6
    The most likely cause of the issue is wireless interference. Have you eliminated that possibility?
     
  6. limonair thread starter macrumors newbie

    limonair

    Joined:
    Apr 17, 2016
    #7
    I tried to change the channel, after looking for the less used near me. I even tried to change to 802.11g instead of n...
     
  7. richard2 macrumors regular

    richard2

    Joined:
    Oct 21, 2010
    Location:
    England, United Kingdom
    #8
    802.11n is significantly more resilient to interference than 802.11g.

    Do you own any other devices that support Wi-Fi, such as an iPhone?
     
  8. limonair thread starter macrumors newbie

    limonair

    Joined:
    Apr 17, 2016
    #9
    I switched back to 802.11n.

    Yes, I have an android phone, my girlfriend's PC (running windows) and a logitech squeezebox which are connected without problems to the router (through wifi).
     
  9. richard2 macrumors regular

    richard2

    Joined:
    Oct 21, 2010
    Location:
    England, United Kingdom
    #10
    Are any packets lost when you ping your router from your other devices?
     
  10. limonair thread starter macrumors newbie

    limonair

    Joined:
    Apr 17, 2016
    #11
    I launched several times a ping from the windows PC of my girlfriend and a ping on my macbook pro at the same time, on the IP of my router (192.168.1.254) and I have none or close to 0% of packet lost on the windows PC. On my mac I have sometimes 5%, sometimes 95% !

    It also depend on where I am in my apartment (near the router or at 4 meters - in the same room)...
     
  11. tom123, Apr 24, 2016
    Last edited: Apr 24, 2016

    tom123 macrumors regular

    tom123

    Joined:
    Apr 9, 2006
    Location:
    Ohio
    #12
    From a post on another thread - this work for me! Thank this guy if it works for you too.
    mattopotamus

    "I had a lot of wifi drops and went to system preference----network---advanced----TCP/IP----configure ipv6 and changed it to link-local only."

    On my iMac - it doesn't seem to matter, automatic or link-local only - works good. But on the new MacBook it has to be on link-local only or i get dropouts!
     
  12. limonair thread starter macrumors newbie

    limonair

    Joined:
    Apr 17, 2016
    #13
    I tried. Not better.
    The strange thing is that I begin to loose packets when I am at 3-4 meters from the router. Before I was able to get sifi through walls at 5-6 meters at least.
     
  13. benthewraith macrumors 68040

    benthewraith

    Joined:
    May 27, 2006
    Location:
    Miami, FL
    #14
    It's not.

    https://discussions.apple.com/thread/7378542?start=120&tstart=0

    This is a legitimate problem occurring for a lot of people with late 2013 macbook pros and some later generations. The WiFi driver is legit crashing, whereas it works perfectly fine on Windows.

    That said, I have had zero crashes on the second OS X 10.11.5 beta.
     
  14. limonair thread starter macrumors newbie

    limonair

    Joined:
    Apr 17, 2016
    #15
    Thanks for your information benthewraith.
    But I still don't understand why I have the problem with Yosemite also ?

    Can you tell me how to check that the WiFi driver is crashing ? (Terminal command or other)
     
  15. benthewraith macrumors 68040

    benthewraith

    Joined:
    May 27, 2006
    Location:
    Miami, FL
    #16
    In the console, you can find crash reports for various things. Driver crashes have been showing up for me. Ironically, since airdropping a file to my computer, the behavior has returned. Turning the WiFi on and off fixes it right now.
     
  16. limonair thread starter macrumors newbie

    limonair

    Joined:
    Apr 17, 2016
    #17
    Hi,

    I still have troubles with wifi.
    I did not noticed particular errors in the console when I enconter the troubles, though.

    I want to try with a wifi dongle so the wifi card is different, and see if it changes something... But I first need to find a wifi dongle :)

    @benthewraith : how is it on the OS X 10.11.5 beta ?
     
  17. benthewraith macrumors 68040

    benthewraith

    Joined:
    May 27, 2006
    Location:
    Miami, FL
    #18
    It's been crashing on me still, but not as frequently, and it's easier to recover from a stall (simply turning WiFi on and off. I used to have to shut down and restart.). Here's a picture of my console.
     

    Attached Files:

  18. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #19


    Just a heads up but it is perfectly possible for "normal" WiFi issues to occur instead of, or in parallel with any driver issue. Just because there IS a known WiFi driver issue doesn't mean all the previous normal issues go away and EVERY issue has to be down to this.
     
  19. limonair thread starter macrumors newbie

    limonair

    Joined:
    Apr 17, 2016
    #20
    True.

    And yesterday, I opened my Macbook and disassemble it.
    I found that the wires of the wifi antennas are cut ! This explains why I loose the signal when I am away from the wifi router and why I loose packets !
    Now my problem is to find a spare part to replace both wires and antennas (I assume it is solded together)...

    [​IMG]
     

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