Per the title, this is the extent of my problem. When booting this system, there is no output on the screen (or even a signal – the monitor goes to sleep) until Windows comes up and shows me the login screen. Aside from this annoying BIOS/UEFI issue, the computer works normally.
If I connect a monitor via HDMI instead of DisplayPort, then I'm able to see the BIOS/UEFI as expected, boot messages, and so forth. However, due to my workstation setup (HDMI on my monitor is connected to another system), I want to stay on DisplayPort if at all possible
Further, apparently randomly, a 1 long, 3 short beep code is generated on cold boots, which indicates inability to detect the GPU. (This beep does not happen every cold boot, and happens roughly 60% of the time)
However, even on boots where this beep code happens, eventually Windows starts, displays the login screen, and the computer works otherwise normally.
This problem started when I upgraded from a GTX970 to a GTX1070. The 970 did not have this problem, the 1070 and 2080 did.
System Specs
- ASUS Maximus IX Hero (BIOS version 1301, 3/14/2018)
- I7-7700K @ 4.2GHz
- 32 GB RAM
- GeForce RTX 2080 SUPER (previously a GeForce 1070, and before that a 970)
- Windows 10 Pro
What I have tried
- Setting the Compatibility Support Module to Auto/Enabled/Disabled (source, fixed the problem for someone else)
- Setting PEG as the primary display device in the UEFI/BIOS.
- Installing Windows 10 in UEFI mode (by installing with the CSM set to enabled or auto)
- Disconnecting all devices from the computer aside from the keyboard and display
- An entirely new GPU (Twice!)
- Another DisplayPort monitor
- Another DisplayPort cable
- Modifying the deep sleep, OD, and refresh rate overclock on the monitor.
- Every combination of the above three items
- Upgrading the GPU firmware on the 1070 (source, references "blank screens on boot until the OS loads")
How do I get the BIOS/UEFI output to show up on my one and only monitor?
Best Answer
I could not enter BIOS. Win 10, ALIENWARE R9 w/ RTX2080 super, ACER XV273K monitor. My monitor OSD "source" was set to "DP1." I have 2 DP cables installed (DP1 & DP2). This computer also had problems waking from sleep. The solution: Set "source" to "auto." Both problems went away.
The down side of this: booting takes a few seconds longer due to the monitor running through all the source options. Cost/benefit is still a plus.