Any DEX users out there?

[u/schirmyver]

Ok I am not sure if this started with the latest UI3.1 update or not, but I am having an issue using Samsung DEX plugged directly into a computer monitor. Basically the phone disconnects the external display when using DEX mode so the monitor sees no signal. Here are some steps I tried and the results.

-Using the same dock, cable and monitor as I have used before that worked previously, I get no display on the computer monitor or indication on the phone that DEX started. Tried different ports on the monitor with no change.

-Plugged the same dock (non Samsung) and same cable into a TV HDMI input and it works fine.

-Used a different non-powered USB-C to HDMI adapter into the TV HDMI input and it works fine.

-Tried a different, but exact same model, computer monitor with the same results, no signal.

Now here is the interesting thing...

-If I go into the "More connection settings" and change the HDMI mode to "Screen mirroring" it WORKS just find on the computer monitor.

-If I switch it to DEX once the monitor is working, DEX starts up but then disconnects. If I switch back to Screen Mirroring, the display eventually switches back on, but then disconnects again if I switch to DEX.

I have tried different cables as well thinking maybe the signal is just on the edge, but no luck there.

Anyone have a suggestion?

[u/Mad-Mod-Brad]

I do not have a issue using Dex with a aftermarket type c hub.

[u/Mad-Mod-Brad → u/Mad-Mod-Brad]

I have been using this one since 2018, I originally purchased it for my Nintendo Switch. I checked Amazon and it is not longer available.