[x86-64] Can't install LibreELEC with RX550

Hi,

so far i used the iGPU of my AMD GPU. Now i tried a new graphic card (RX550) but i could start LE. I tried the installed LE and tried to boot from a new install usb drive. The graphic card works, i can see the mainboard start screen and bios. I also can see the first message of the install drive but then the screen is black. Is the GPU unsupported?

I can't disable igpu but switch between PCI and igpu.

It's an AsRock AM1H-ITX.

Is there a list of supported GPUs?

Is used a Nvidia graphic card month before. This worked. The only thing i had to do was to switch to pci graphic in bios settings. So i don't thinks it's a problem with the bios settings.