I have a similar problem... kind of... I want to ask can someone edit/backport drivers to get Audio/Sound enable in Hyper-V Server any edition maybe universal driver for all editions? So far, audio has similar problems between WinPe and Hyper-V, so maybe the solution will be useful for both.
in order to get to this stage, a successful porting needs to be first accomplished. documentation will (hopefully) follow
has there been any progress on this? im trying to make a windows 7 VM under OVMF for experimental purposes, but even after update KB5017631 i still cant get it to boot without a CSM.
Windows 8's videoprt.sys is also different. For this to succed, Windows 8's videport drivers needs to be backported as well. Because it relies on GOP instead of the INT 10h intrerupt and it's backwards conpatible. The windows 8 basic display driver should make calls to windows 8's videport file. For it to coexist with windows 7's video port, it should be videopr8.sys to avoid creating bugs in the system. When configured this way, and when the backported drivers runs, the original videport.sys is unused by the driver.
I wonder if as many people as possible who could make these adaptations are even aware of them... This backporting is really important for the irreplaceable Windows 7, and it's really desirable that it succeeds.