How do I know about VGA output priority on P10S-M WS/IPMI?
Please refer the following information of VGA output priority.
Default VGA output priority:
1) Addon Card: offbaord > Intel > Aspeed
2) Without Addon Card: Intel > Aspeed
3) Without Intel graphic CPU: offboard > Aspeed
If you want to adjust VGA output priority, you can go to BIOS->Advanced->Chipser Configuration->PCI/PCIe Subsystem Settings->VGA Priority.

About item of VGA Priority, please refer the following matrix.
L: monitor lights up. (under BIOS)
D: Device lights up (under Windows and install all the drivers)
X: Device disable
No Multimonitor | Default | ||
Addon Card | offboard | Intel | Aspeed |
Bios setting: offboard | L/D | X | D |
Bios setting: CPU Graphics | D | L/D | X |
Bios setting: onboard | D | D | L/D |
Without Addon | offboard | Intel | Aspeed |
Bios setting: offboard | X | L/D | X |
Bios setting: CPU Graphics | X | L/D | X |
Bios setting: onboard | X | D | L/D |