*** PLEASE REPLY TO THE LIST, NOT TO ME *** (There are lots of people there, much better qualified than I am to solve the problem.) > http://secure.netroedge.com/~lm78/supported.html > => > ServerWorks OSB4, CSB5 i2c-piix4 OK, so it must be there. Since you have already updated the BIOS, you are supposed to force the address. The problems are, that we have to find the address, and that the procedure is known to be extremely dangerous. First thing, could you issue a "lspci" (or "cat /proc/pci") and see if you can find an entry for the PIIX4. I got a Compaq desktop system here, which says: 00:14.3 Bridge: Intel Corp. 82371AB/EB/MB PIIX4 ACPI (rev 01) Flags: medium devsel, IRQ 9 That's what you are looking for. The function must be 3. >From our docs (busses/piix4): On some computers (most notably, some Dells), the SMBus is disabled by default. If you use the insmod parameter 'force=1', the kernel module will try to enable it. THIS IS VERY DANGEROUS! If the BIOS did not set up a correct address for this module, you could get in big trouble (read: crashes, data corruption, etc.). Try this only as a last resort (try BIOS updates first, for example), and backup first! An even more dangerous option is 'force_addr=<IOPORT>'. This will not only enable the PIIX4 like 'force' foes, but it will also set a new base I/O port address. The SMBus parts of the PIIX4 needs a range of 8 of these addresses to function correctly. If these addresses are already reserved by some other device, you will get into big trouble! DON'T USE THIS IF YOU ARE NOT VERY SURE ABOUT WHAT YOU ARE DOING! So be very careful. I'd suggest you wait a bit so that Mark gets a chance to answer, I think he knows the PIIX4 better than anyone here and may have some precious piece of advice for you. (From previous mail) > sensor-detect also fails... How does it fail? -- Jean Delvare http://www.ensicaen.ismra.fr/~delvare/