New Macbook Pro: Wifi drops when externals connected

Discussion in 'MacBook Pro' started by Meister, Nov 3, 2016.

  1. Meister Suspended

    Meister

    Joined:
    Oct 10, 2013
    #1
    Louis Rossmann posted this video where he shows how wifi drops once externals are connected to the new dumbed down 13" rmbp.

    Can anybody confirm this?

     
  2. Balaamsdonkey macrumors 6502

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    Washington
    #2
    I watched a good amount of the video, and he was later unable to replicate the initial behavior. Some people in the "we just bought our late-2016 MBP thread suggested he is using crappy dongles, or that the plug is contacting the frame of and shorting something out, but I'd love it someone test this that has one as well.
     
  3. mrex macrumors 68030

    mrex

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    #3
    those "crappy dongles" work fine with other laptop.
     
  4. Meister thread starter Suspended

    Meister

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    Oct 10, 2013
    #4
    It seems to depend on the device he connects.

    It's still very concerning.
    As is the loud keyboard.
     
  5. mrex macrumors 68030

    mrex

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    #5
    damn i didnt listen the keyboard today when i was testing it... i had earpods and listening music...

    and that would be a real nightmare if it is going to be hit and miss with dongles...
     
  6. Meister thread starter Suspended

    Meister

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    Oct 10, 2013
    #6
    Not just dongles - devices
     
  7. /V\acpower macrumors 6502a

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    Jul 31, 2007
    #7
    I had it happen too with my 13' MBP.

    I have a USB C to USB A adapter.

    When I plugged in my USB 3.0 Thumb drive with the adapter it simply cut wifi. (did it twice while listening to a live stream audio. Instantly cut when I accessed the drive. It seem to be software.)

    However using the same adapter and syncing my iPhone had no problem at all.

    And an hour ago using the same thumb drive again it didn't drop.

    I'll wait and see.
     
  8. torana355 macrumors 68030

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    Sydney, Australia
    #8
    Ive got the offical Apple USB-c to USB-a Adaptor, I've only used my sandisk usb3 thumb drive so far but no Wifi dropouts yet. I will keep an eye on it.
     
  9. /V\acpower macrumors 6502a

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    #9
    Can someone make a summary of this 1h 19m video ?
     
  10. robotica macrumors 6502a

    robotica

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    #10
    MacBook bad
     
  11. mrex macrumors 68030

    mrex

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    #11
    nope.. just the new one is crappy for its price and because of the price everything should just work... and many crotch shots.
     
  12. Balaamsdonkey macrumors 6502

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    #12
    Despite you're lack of quoting me properly, I'm assuming that was aimed at me. Anyway, don't shoot the messenger man, I was just relaying the statement.
     
  13. /V\acpower macrumors 6502a

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    Jul 31, 2007
    #13
    Ok ok, i've played a bit with it.

    it's systematic.

    But it seem to depend on the device I use.

    Basically I use this USB key : https://www.amazon.com/ADATA-UV131-...d=1478204459&sr=8-8&keywords=adata+usb+3+16gb

    with this adapter : https://www.amazon.com/TECHTOO-Type...-19&keywords=USB+type+C+to+usb+type+a+adapter

    ---

    Ok I started a live radio on iTunes.

    Whenever I plug the drive with the adapter, it's systematic Wifi shut down instantly. I can't refresh pages. Eventually the laptop tell me i lost connection to the internet. It start back instantly when I remove it.

    It happen in both USB C port. It happen with the power cable plugged in the other port or not.

    It also happen if I add this particular USB 3.0 hub between the adapter and the usb thumb drive :

    https://www.amazon.ca/Anker-Bus-Pow...id=1478204874&sr=8-5&keywords=anker+usb+3+hub

    (same thing, whatever the port, no matter if power is plugged or not.)

    ---

    However. 2 things :

    Just plugging the adapter or the adapter+hub doesn't cut down wifi. It's only when I actually add the thumb drive.

    With both the same adapter and the same hub, + lightning cable + iPhone and sync. It doesn't affect the internet.

    So for now, it seem to be linked to my thumb drive.

    I will find my old external HDD and see if it does the same thing. Stay tuned.
    --- Post Merged, Nov 3, 2016 ---
    Update :

    the adapter + 2.5mm USB 2.0 enclosure (powered by the laptop) = no effect. Even when I make a transfer. (it's actually plugged in right now)

    Next step : find my old usb 2 thumb drive ...
    --- Post Merged, Nov 3, 2016 ---
    New Update :

    adapter + USB 2.0 Kingston Thumb drive = no effect. (even when working on a large transfer).

    Next step : Removing one of my 3.5' HDD from my desktop PC, finding my USB 3.0 dock (powered by a wall plug) and see if it have any effect. Just to check if it is linked to USB 3.0 (just in case) or linked to my particular thumbdrive.
     
  14. Macalway, Nov 3, 2016
    Last edited: Nov 3, 2016

    Macalway macrumors 68030

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    #14
    This issue probably should be looked at closely now, instead of later. The post above me is a good start. (thanks!)

    Figure out the extent of this. Looks pretty bad though. It's one thing the drives not working, but this?
     
  15. /V\acpower, Nov 3, 2016
    Last edited: Nov 3, 2016

    /V\acpower macrumors 6502a

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    #15
    UPDATE :

    Adapter + USB 3.0 HDD Dock (self powered) + HDD + big file transfer = No effect on Wifi. Stream still strong. Pages updates as fast. (no lost bar on the Wifi icon, like any other test that didn't affect wifi signal.)
    --- Post Merged, Nov 3, 2016 ---
    PROBLEM SOLVED! :

    Ok, from a bit of google search, it seems related to USB 3.0 and 2.4Ghz Wifi band (widely used on a lot of wifi setup). It doesn't seem to be related to the 2016 MacBook Pro but to badly "shielded" usb 3.0 devices that emit interference that disturb 2.4Ghz Wifi Signals. Also its easy to find people complaining about the same effect on other computers, Macs or PC.

    http://www.intel.com/content/www/us...al-bus/usb3-frequency-interference-paper.html

    http://www.pcmag.com/article2/0,2817,2423604,00.asp

    (just make a quick search on USB 3.0 and Wifi interference)
     
  16. Ries macrumors 68010

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    Apr 21, 2007
    #16
    LOUD KEYBOARD
    Some cables/dongles/devices kills wifi when connected.
     
  17. /V\acpower macrumors 6502a

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    Jul 31, 2007
    #17
    UPDATE : New test

    Original USB 3.0 Thumbdrive that caused the problem + Adapter + Everything wrapped in tinfoil = ... NO PROBLEM WITH WIFI !

    So basically my cheap USB 3.0 Thumbdrive make interference with 2.4 Ghz Wifi band.
     
  18. torana355 macrumors 68030

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    Sydney, Australia
    #18
    What happens if you use that same thumb drive in another laptop though? It seems like its the 2.4ghz wifi thats has all the issues, I remember reading somewhere that it has more issues with interference then 5ghz. Im running 5ghz wifi and have no issues. Though it does not explain why the same device works fine in a different machine on the same wifi network.
     
  19. Ries macrumors 68010

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    #19
    Sound like the drive is able to ****up the MacBook Pro's electromagnetic shielding and become an antenna radiating interference in the machine. Grounding issue in the connector or adapter?
     
  20. /V\acpower macrumors 6502a

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    Jul 31, 2007
    #20
    Well it's not at all a new "issue" and it does seem that other PC user have had similar problems.

    A badly isolated device + 2.4 Ghz Wifi + relative proximity to the computer or router = wifi drop.
    --- Post Merged, Nov 3, 2016 ---
    Nah, it seem to be simply related to air waves interference. My thumbdrive with the same adapter but wrapped in tinfoil (to minimize interference in airwaves) work perfectly well.

    Plus, the same adapter (the only thing touching the laptop) with my USB 3 HDD dock station bascially right next to the MBP doesn't give me a connection problem.
     
  21. Macalway macrumors 68030

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    #21
    You are a very smart person :)
     
  22. Ries macrumors 68010

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    Apr 21, 2007
    #22
    They'll fix it in the upcoming kaby lake, 4K OLED, 32GB Ram MacBook Pros :) From the last link:
    "We have resolved this issue with better hardware design that isolates this noise and reduces the impact to almost negligible on our Wi-Fi routers with USB 3.0 like the R6250 (AC1600 WiFi router). In a non-optimized design the impact can be quite significant on the 2.4GHz band."
     
  23. westie3130 macrumors newbie

    westie3130

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    Sep 13, 2016
    #23
     
  24. cmaier macrumors G4

    Joined:
    Jul 25, 2007
    Location:
    California
    #24
    different machines will be affected differently by interference in different frequencies. you can even get different results based on which side of the machine the interference hits, the shape and size of the room, the material the desk is made of, etc. Radio waves bounce around. The real problem is the thumb drive that is clearly exceeding the RF output it should be putting out.
     
  25. Macalway macrumors 68030

    Joined:
    Aug 7, 2013
    #25
    Placement of the antenna maybe? Whatever it is, it's odd. Should be interesting figuring out the parameters of the interference

    So maybe we need a list of offending thumdrives to avoid

    But, that guy in the review also had issues with the USB microscope adapter, right? And wasn't that on a tether? (I may have this wrong, no way i'm going back there :D )
     

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