Can i remove GPU, displayport and screen "smart" features?

[Someone]

I have an Nividia 1070 that is connected via displayport to a dell screen. Manytimes while i am booting FreeBSD (and other operating systems, its dual boot with windows 10, even when booting with a linux distro live usb) the screen is not showing hardware checks, BIOS etc. I get the message "no DP signal in your device, entering power saving mode".
I have an Asus ROG BIOS by the way, if it helps. Rebooting after powercycling didnt resolve the issue. The disk is heard spinning, so its probably just a gpu/screen signal issue.

In the days of old, computers just sent to the screen their signal without "smart" stuff intervening, the good old VGA, PS/2 keyboard and mouse days.

From dmesg (after a few unsuccesful boot tries and even a failed powercycle try) :

Root mount waiting for: usbus0

.....Razer peripherals.....

usbus0: waiting for BIOS to give up control

Is it safe to flash the BIOS with something like coreboot or similar? (Intel i9 9900 8 cores 16 hardware threads, ROG stix motheboard).

Thanks for any info about this issue.

 

[T-Aoki]

Doesn't your BIOS / UEFI firmware has something like "Boot Time Extention" or something alike (the name would be different by manufacturer, possibly depending on the model / series, too)?

Does something happen if you press "Enter to BIOS (UEFI) menu" hotkey (your motherboard user's manual may have the description) multiple times on boot, still on black screen? Does BIOS / UEFI menu appears?

For example, on ThinkPads I've ever used before, it was F1 key (usual Phoenix BIOS'es would, too).
On Minisforum MS-01, it's Delete key (most AMI BIOS'es would, too).
Others? Sorry, don't know.

 

[SirDice]

Another (BIOS/UEFI) setting that might be involved, which graphics card the system initializes first, PEG (PCI Express Graphics) or IGD (Internal Graphics Device), and sometimes "auto" or "multi". In your case that would be PEG (because you have an "external" PCIe graphics card, not using the onboard iGPU)

usbus0: waiting for BIOS to give up control

That might be EHCI handoff, some older systems default to "Off". You want this turned on (let the OS handle it).