Re: Socket F, mcp55, mcp65 and drivers.
I can tell you somthing:
I have a nforce 520 board.
The board has the MCP65 controller.
This controller supports AHCI.
Some revisions of this controller have problems with MSI.
This controller supports NCQ but does not set the right flag.
Monday a patch on linux-ide was posted that deactivates MSI with problematic revisions and enables NCQ. I am testing this patch, it works fine so far.
NVIDIA-employees were part of the solution finding process.