Wifi Disconnect while HDMI is connected

Will using ethernet help? Assuming its the interference from the HDMI cable? I have the same problem as well,

I change the hdmi cord and everything works fine

I just experienced this problem for the first time on my new XPS 13.

I updated the BIOS and so far it is working.

I am having the same problem but I have tried with 2 different Dell laptops, 2 different HDMI cables and I have a Dell monitor. Everything works together except for the Inspiron 15 7000. As soon as I connect the HDMI cable, the wifi drops out. I have tried updating the BIOS but for some reason it won't update.

This is a replacement for a previous Inspiron that also failed with the HDMI wifi setup along with other issues. This unit doesn't have the other issues, but still won't connect with monitor and wifi. I have asked for a refund.

I have reported the same issue , G7 if I use type C all good as soon as I change to HDMI , I get disconnected only by changing the wireless adapter settings to 2.4 GHZ I can get access, if I use type C only then I can use the 5GHZ , DELL has changed my wireless card 2 times already. 

Hi,

I have same trouble with Latitude 7410. 

When HDMI (Dell U2417H) is connected and USB C (battery charger) is connected (I tried both USB C input) my wi fi goes out. But when I unpluged HDMI or charger (USB C), wi-fi works perfect. 

For now, I have check that trouble is, then both inputs are connected (HDMI or USB C, no matter what USB C). I do not think, that it is connected with shield inside cable because when monitor is connected by HDMI, but all USB C are free, monitor and wi-fi works fine. 

Help!

Hi Guys,

I had the same problem. Even did some driver updates but it still persisted. I have a Dell Latitude 7410 Laptop. Cant remember the monitor. 

My workplace IT support was able to fix this by getting me a dock station. Once the monitor was connected to the dock station and dock station to laptop, I had no more internet issues.

I am lucky that this is a work laptop. For those with personal laptops, I do not think it is fair to have to buy an extra dock station just because there is an issue with Dell's laptop and monitor. I have had two lenovo laptops (one personal and the other from my former workplace) both connected to external monitors and there has been no problem with WiFi connection.

Dell should try to fix this.

Thanks

Sorry I can't find the solution in replies. 

Is there a solution for this?

Thanks

Meena

I am having the same problem with my XPS 15 9500. If I connect a third party adapter or docking station, the wifi connection is lost immediately. If I connect the original Dell adapter that was in the box with the laptop, the connection quality drops significantly to under 1 Mbps or even to 0. Shielding the cables with aluminum foil didn't work, drivers are all up-to-date.

It is a shame that this laptop is meant to be the best for creative work and you cannot even use basic functions like wifi or external display - for this load of money.

I have a 7410 which suddenly stopped internet connection a few days ago even though there’s excellent WiFi connection. Dell support analysed everything to day and found nothing wrong. Advised I spend £50 on a software support ticket from Dell. I’m a scientist so I unpicked everything til internet worked and re added cables etc until internet dropped. For me, it was the length and make of the HDMI cable attached to the Dell monitor. I replaced with a short version (standard from Dell actually) and internet is back on. Maybe the old cable was hitting the radiator or getting too close to the power socket and causing interference??! I’m just guessing. I was playing around with command prompts and IP addresses and all sorts of stuff! Hope this helps some folks. 

As per Dell-Cares, updating this drivers should help with the issue:

1. Intel Chipset

2. Thunderbolt Controller Firmware

3. Thunderbolt Controller Driver

"when I connect my Desktop to the Laptop"
That doesn't make sense to me? I thought the PC and Laptop were connected to the LG 34UM95-P monitor?

What were the specific updates installed on the Latitude 7410 just prior to the issue appearing?

Are you using any cabling longer than 6ft? If yes, test only 6ft cabling.

Dell latitude 5420, same problem; all updated: BIOS, drivers etc. with SupportAssist ... it's a serious problem, I can't work properly!

Here is the solution that works for me (Dell 7410):

1) Go the adapter setting of Wifi 

2) Select configure 

3) In advance tab, select Wireless mode (802.11n/ac/ax) 

4) Select 802.11n option

Reason of the issue:

Wifi 802.11ac and 802.11ax work on higher bandwidth 80Mhz/160Mhz. The use of HDMI can lead interference with Wifi channel. When we select 802.11n option, Wifi will connect in 20Mhz or 40Mhz channel, which can coexist with HDMI. 

In 802.11n mode Wifi bandwidth will be lower ~100Mbps, but it will be sufficient for internet usage

Hope this solution works for you!

Thanks,

Om