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PC Graphics

hernan2
Journeyman III

DisplayPort to HDMI not working on amd card but does on nvidia

Hi everyone! Pretty much what it says on the tittle. I have and AMD GPU that has 3 display ports and 1 hdmi, and two screens with only hdmi and vga so I want to plug one HDMI to HDMI and the other one Display port to HDMI (using an active adapter I have).

On the AMD gpu this does not work, on the NVIDIA card this does work, changing no parameter on any place.

 

Some more data:

Am I using the correct adapter? Yes. It's active, and is DP (gpu) -> HDMI (screen).

 

This is the setup:

- Two screens Samsung lf24t35 (1xVGA and 1xHDMI input)

- One DisplayPort to HDMI Active adapter

- One Nvidia RTX 3060Ti from Palit (1xHDMI 2.1 3xDisplayPorts 1.4a)

- One AMD RX 6700XT from Asrock (1xHDMI 2.1 3xDisplayPorts 1.4)

 

Tests, I did these on Linux Debian with AMD drivers, Linux Debian Live with no drivers and Windows 11 with AMD drivers:

 - Reseted screens by unplugging them the whole night.

 - Checked refresh rate on the screens (not on windows or linux display options) (60hz on both)

 - Tried using screen A with hdmi and screen B with the adapter display port to hdmi.

 - Tried using screen B with hdmi and screen A with the adapter display port to hdmi.

 - Disabled/enabled CSM (There are some threads suggesting it).

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hernan2
Journeyman III

Ok, I solved it but still don't know what was the problem. I bought a DP to HDMI cable (not active AFAIK) and it works.

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