> You're not missing any driver. What you're missing is the SMBus master > device itself, because it was hidden from you by the BIOS, but given > what the BIOS does with it, that's the only safe approach. I don't see a Linux driver for it, but there is a spec for SMBus access via ACPI, which could synchronize with SMM properly. The spec's at http://www.smbus.org/specs/ specifically SMBus Control Method Interface Specification, version 1.0 http://www.smbus.org/specs/smbus_cmi10.pdf Supposedly there should be something like Device(SMB<id>){ Name(_HID, "SMBUS01") // Hardware ID (PnP ID) Name(_UID, <uid>) // Unique Identification Method(_SBI, 0) {...} // SMBus Information Method(_SBR, 3) {...} // SMBus Data Read Method(_SBW, 6) {...} // SMBus Data Write Method(_SBT, 6) {...} // SMBus Data Transfer Method(_SBA, 0) {...} // SMBus Alert Information } Does anyone know the right incanation (probably using "acpidump") to see if this is supported on the problematic machines? If so, writing a driver becomes an interesting question. (This seems rather obvious, so I hope this idea hasn't been discarded already for some reason I have overlooked.)
