Your internet connexion drops when you connect any external device to your Macbook Pro touchbar ? The solution is completely insane but really works. Thanks to Joshua King you just have to wrap your dongles with tinfoil to make it work. Unbelievable. This prevents interferences.
If anyone is wondering how to get a full resolution (2560x1080px) from the LG 29EA73 on a Macbook Pro 15″ without spending a hundred bucks on the Apple Store, here’s a solution.
No need to buy from Apple a Mini DisplayPort/Dual-Link DVI that costs around 99 euros, just get a DVI to Mini DVI cable for 20 euros and it will do the job perfectly. Using a HDMI cable is apparently not enough for your mac to display a 2560×1080 resolution. Only DVI link can do that.
Hope it helps.