ACPI: Advanced Configuration and Power Interface
This is what I recommended disabling. There is a standard, but not every BIOS vendor appears to follow it. Disabling the main driver for it in the kernel eliminates many problems. Usually problems related to MP operation, power and cooling, or "hung" kernels during boot.
I can't recall ever hearing of anyone having trouble with PS/2 keyboards under any circumstances. I have only heard of people having trouble with USB keyboards configured (or not) as "legacy" devices.
|