Hi,
We encounter an issue, when we installed 2 Windows 10 OS in one system,
and in cold boot, the dual boot menu work normal in Local DP screen.

Then after reboot, the dual boot menu will show to external DP port, even we not plug a external DP monitor, it will let us Local DP show a black screen, need to wait timeout seconds then show first OS login screen in Local DP.
It is Windows 10 known issue or Intel graphics driver issue?
Thanks & Regards.
USIGino

