hi

under ubuntu 10.04LTS
on dell vostro 3500

Intel Corporation 5 Series/3400 Series Chipset SMBus Controller [8086:3b30] (rev 06)

By default i2c-i801 is in blacklist.conf
if i remove from blacklist here it is dmesg

i801_smbus 0000:00:1f.3: PCI INT C -> GSI 18 (level, low) -> IRQ 18
[   14.801179] ACPI: resource 0000:00:1f.3 [0xf000-0xf01f] conflicts with ACPI region SMBI [0xf000-0xf00f]
[   14.801182] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver

where SMBI is in DSDT_DELL_WN09.dsl

                OperationRegion (SMBI, SystemIO, ShiftLeft (SBAR, 0x05), 0x10)
                Field (SMBI, ByteAcc, NoLock, Preserve)
                {
                    HSTS,   8,
                            Offset (0x02),
                    HCON,   8,
                    HCOM,   8,
                    TXSA,   8,
                    DAT0,   8,
                    DAT1,   8,
                    HBDR,   8,
                    PECR,   8,
                    RXSA,   8,
                    SDAT,   16
                }


lspci -vvnnxxxx

00:1f.3 SMBus [0c05]: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller [8086:3b30] (rev 06)
    Subsystem: Dell Device [1028:0441]
    Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
    Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    Interrupt: pin C routed to IRQ 18
    Region 0: Memory at fbc05000 (64-bit, non-prefetchable) [size=256]
    Region 4: I/O ports at f000 [size=32]
    Kernel modules: i2c-i801
00: 86 80 30 3b 03 00 80 02 06 00 05 0c 00 00 00 00
10: 04 50 c0 fb 00 00 00 00 00 00 00 00 00 00 00 00
20: 01 f0 00 00 00 00 00 00 00 00 00 00 28 10 41 04
30: 00 00 00 00 00 00 00 00 00 00 00 00 03 03 00 00

finaly, with or without i2c-i801 and//or k8temp load at startup
sensors return only

fidit@de100816A:~$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:       +39.5°C  (crit = +100.0°C)

under everest on seven, 6 temp are detect.