Model:30AT0054PB (ThinkStation P310)
SN: S4AM6910
BIOS rev: FWKT80A
ME Firmware rev: 11.0.27.3000
Has anybody have any success with running VNC via KVM/AMT connection to P310 in headless mode (without monitor)?
BIOS and Intel ME Firmware updated.
In my situation as soon as I disconnect VGA cable, the vnc client disconnects with error:
Error 0x80862000. Unsupported or inactive display adapter.
After cable reconnection the display in the client come back almost instantly.
It seems, that there's a bug in power management code.
Lenovo staff member confirmed that it is a bug. It looks like Lenovo plans some BIOS update in the near future:
Source