By BIOS version do you mean BIOS firmware? If that is the case, then if it were possible for this update to be ACPI compliant and preserve backwards compatibility I don't see why it would break suspend/resume on windows. But, of course, this is an uninformed guess.
I wish I had time to go and look for your hypothetical driver and reverse engineer it.
Enrico,
By BIOS version do you mean BIOS firmware? If that is the case, then if it were possible for this update to be ACPI compliant and preserve backwards compatibility I don't see why it would break suspend/resume on windows. But, of course, this is an uninformed guess.
I wish I had time to go and look for your hypothetical driver and reverse engineer it.