Robert Hancock wrote: > We can detect an AHCI-capable Intel chipsets (in most cases anyway), > but problem is that a lot of systems with such chipsets, especially > laptops, unfortunately have no way to actually put the controller into > AHCI mode (no BIOS option for it). We could whine about it, but in a > lot of cases there's not much that can be done about it.. > I have a couple of machines with those BIOSes, and apart from the fact that the Intel ICH datasheets say something like "none but the saintly BIOS writers shall program this register", it does seem to be possible to put an ICH9R into AHCI mode using setpci and the fake hot plug driver... I just wondered what the potential pitfalls might be of doing this? Obviously you wouldn't want to be doing anything with the controller at the time that you change it's mode. Is there also the risk of the bloody bios fiddling with the device after the OS has booted (and then getting surprised about it no longer being in piix mode)? Cheers, Tim. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
