Question I can't disable CSM in BIOS

Jul 5, 2023
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Hello, I can't disable CSM in BIOS. The message appears: "display device does not support uefi graphics output protocol " because my video card "does not support uefi gop". Tried many things but no solution. I want to install Windows 11, but due to this problem I can't disable CSM to enable "Secure Boot". My motherboard is: Steel Legend B450M and my video card is an RX580. If anyone had the same problem and can help me.