topic Re: Problem with wifi when connecting hdmi in Wireless

Problem with wifi when connecting hdmi

gabriel1995 — Thu, 25 Nov 2021 14:39:36 GMT

Hi, I just bought a gigabyte g5 with intel wifi 6 ax200 160MHz wifi card. When connecting it to an external screen via HDMI, the wifi stops working. If I disconnect the hdmi cable the wifi works perfectly again. I have tried several different HDMI cables and on another display and the same thing happens. I have tried to update the drivers to their latest version and it does not solve it.

thanks

Re: Problem with wifi when connecting hdmi

megan3000 — Fri, 26 Nov 2021 21:57:35 GMT

Is the HDMI cable touching or near the wireless antennas? I have seen scenarios where poor "cable shield " may cause this type of issues (radio-frequency interference, "cross-over effect... etc)...

This could be also due to poor shielding of the ports on the motherboards or internal circuitry... I don't think this is software issue but hardware issue since you can reproduce the problem connecting the HDMI cable and disconnecting the cable stops the issue....

What happens if you test other type of video ports? DVI, VGA, display port? If same issue, and you already tried high quality HDMI cable avoiding touching or hanging near the antennas, I would say this is a hardware problem ( I don't know if with the cable, antenna, motherboard ports) and you want to review it with the mobo or cable vendor...

I see you have tested some different cables, but make sure they are not "cheap" cables but high-quality certified HDMI cables with better shielding. I saw one post here (couldn't find it) where a user had a similar issue and he solved replacing the cable and using a tie to avoid the cable touching the antennas...

If you search the Internet, you may see many post of issues like this one but with different devices...

Megan ❤

Re: Problem with wifi when connecting hdmi

gabriel1995 — Mon, 29 Nov 2021 18:56:43 GMT

Finally I managed to solve it in the following way: the hdmi cable must have created some interference with the wifi networks, to solve this what I did was change the channels of the wifi bands and it was solved.

Re: Problem with wifi when connecting hdmi

den1235 — Tue, 17 Dec 2024 13:26:26 GMT

Hi - I had the same issue. I have Samsung book4 and I tried to connect it to LG TV through HDMI cable and use LG TV as a second monitor. When I did it, my wifi suddenly dropped. When I would disconnect HDMI cable, the wifi start working again. The following helped me to go around the issue:

For Windows 11: GO to System -> Display -> and change Display resolution to Recommended
Change the scale to Recommended.
GO to Display -> System -> Advanced Display -> 'Select a Display to view or change its settings '-> Select your second display (in my case LG TV)
GO to Display Adapter properties for Display 2 -> Monitor tab -> Select your screen -> decrease the refresh rate to 100, 75 or 60 Hertz
Click okay
If you are duplicating your computer screen on your second monitor, it probably won't fit the full screen on your second monitor. You can use settings on your second monitor (there should be buttons for zoom in or zoom out or option on your remote control) to expend the picture.

Re: Problem with wifi when connecting hdmi

Dearayne — Mon, 08 Dec 2025 19:04:06 GMT

You brilliant human. Thank you!

I have nearly the exact same problem as the OP and changing the refresh rate (in my case 59.94 Hz) pretty much resolved it. I'm not back to full speed, but at least it's bareable now.

I had no idea interference would be the issue.

Thank you! This is something that has been vexxing me for a while when I work from home.

Cheers!

Re: Problem with wifi when connecting hdmi

Dearayne — Mon, 08 Dec 2025 19:39:48 GMT

Update:

The problem was at least partly my HDMI cable, I believe. I changed it and that helped. Pretty normal connection at 60 Hz now.

But hey, the screen refresh rate is a great workaround as well!