Adham Fawarseh,

What monitor are you connecting the laptop to? Have you reseated the cables? Have you reset your router? Have you tried other cables? Does the wifi work when not connected to the monitor? 

It's connected to PHILIPS E234 monitor,
connected with type C adapter that has 3 ports: 1. HDMI 2. normal USB 3. USB type C.
if I disconnected the monitor, the wifi works perfect.
I heard it's something with the HDMI type C and the frequency of the wifi.
the solution that is working for me is connecting port #2 (normal USB) to a stereo and the aux also, everything is fine after doing that.

Please try connecting any other devices to the same Port and see if the issue appears.

This is just to identify if the issue is with the Port or the Monitor connection.

I am having the exact same issue on a Dell G7. I connect an HDMI to my laptop and the WiFi stops working. I disconnect the HDMI and it starts working again. I have tried more than one display and a TV. I have upgraded drivers and checked IRQ settings.

Did you find a solution to this?

I have the same situation and problem with my new Lenovo Laptop when I changed my router to Netgear Orbi mesh network from ASUS AC-68U AI Mesh.  I am managed to solve the problem by replacing the original cheap HDMI cable coming with my BenQ monitor with a better shielded HDMI cable.

Paul

Hi there. I have the same issue with my Dell G7 but I have discovered it will connect to the 2.4 ghz but not our 5.0 ghz WiFi. I have a call back with Dell technical support today so hopefully might get some kind of resolution

Please get one more similar device and then connect the monitor to that device as you would connect the original device.

Then observe if you the wifi disconnects in this case as well.

It is highly unlikely that Wifi stops due too monitor being connected to the device if no tampering has been done with the wires connected in the device.

It did indeed appear to be interference from the HDMI cable. The cable is plugged into the computer via a DVI adapter. At this point, there is exposed metal. I wrapped some aluminum foil around the HDMI/DVI adapter and a good portion of the HDMI cable itself, to hopefully shield the cable/adapter area better.

This seemed to solve the problem. Hopefully, this answer can be of use to anyone else who might run into a similar situation.

I am having the same problem with my inspiron 7386.

May I ask Dell to explain what they are doing to help us get the performance we expect.

Regards

Oh Dear, So I am not the only person on this planet who is facing this issue with dell laptops :(.