Yeah, I'm using an old complaq, and I'm getting the same dmesg error:
[17179590.684000] vt596_smbus 0000:00:14.4: SMBUS: Error: Host SMBus controller not enabled! - upgrade BIOS or use force=1
Something else I've noticed earlier is that when I run a root terminal and run the command "update-manager" one of the errors I get says that dbus could not be initiated. I think it might be related, but I'm really not sure. I'm going to try to get some info from using the command lspci, and maybe try to figure out where to put that data. Will keep you posted.