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- Dec 28, 2011
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My
the alert is a bios alert, one long and 3 shorts. Regarding the headless boot, i have an exotic system with multiple displays, 2 are vga using DP adaptors and one is DVI, i can only see the DVI when booting if i unplug both DP. I had the same issue with my previous board (p9x79) with clover. If i only use the DVI, everything is fine.
Disabling CSM allows your BIOS to run in full EFI mode and disables legacy protocols in the BIOS.
The alert is because you have the new audio feature in OpenCanopy enabled. Disable it in your config.plist if you don't need it.
EFI is important for macOS.
Did you set your GPU to main gpu or something in the BIOS? It might be RX580 related. Maybe it doesn't have GOP support.
I have a Radeon VII and SAGE/10G and no issues whatsoever with BIOS screen, it's perfect with no stretching when booting with CSM disabled.
the alert is a bios alert, one long and 3 shorts. Regarding the headless boot, i have an exotic system with multiple displays, 2 are vga using DP adaptors and one is DVI, i can only see the DVI when booting if i unplug both DP. I had the same issue with my previous board (p9x79) with clover. If i only use the DVI, everything is fine.