Dual Monitor Internet connectivity issues
Hi, whenever I connect an external monitor (dell) to my laptop my internet connection becomes useless. What may be the problem and any solutions?
MacBook Pro 13″, macOS 10.15
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The adapter -- and possibly your Router within 9 feet of your Mac when using the adapter.
Why do I have difficulty with Wi-Fi or Bluetooth devices when USB 3 devices are attached to my computer?
Some USB 3 devices can generate radio frequency interference that can cause Wi-Fi and Bluetooth devices operating in the 2.4GHz band to have issues communicating with your computer. Here are some tips to avoid this issue:
• If your USB device has a cable long enough that you can move the device, place it away from your Mac—and make sure not to place it behind your Mac, or near the hinge of its display. The antennas for Wi-Fi and Bluetooth are located there, and USB 3 devices placed there might interfere with your wireless connections.
• If you're using adapters or dongles on a Mac computer with Thunderbolt 3 (USB-C) ports, plug them into the front port on the left side of your Mac, or into the ports on the right side (if your computer has them). These ports are the farthest away from the antennas, making interference less likely.
• To avoid interference on the 2.4GHz band using Wi-Fi, try using the 5GHz band instead. You can change this on your wireless base station. Bluetooth always uses 2.4GHz, so this alternative isn't available for Bluetooth.
from:
About USB on Mac computers - Apple Support
Resolve Wi-Fi and Bluetooth issues caused by wireless interference
https://support.apple.com/en-us/HT201542
also, this article describes a problem with a DIFFERENT Apple-sold display that knocked the Router off the air if too close:
• LG-display recall -- to address Wi-Fi interference so severe, it knocks the Router off the air if too near the Router.
https://9to5mac.com/2017/02/03/lg-fixes-wifi-interference-problems-with-ultrafin e-usb-c-5k-display-new-units-unaffected/
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