numerous missing sensors on Intel DG965RY with 82801H (ICH8 Family) SMBus Controller

[ticket]

I have an Intel DG965RY motherboard with an 82801H (ICH8 Family) SMBus controller. sensors-detect recommends just the "coretemp" module, which reports two temperatures, one for of each of of my two CPU cores. However, numerous additional sensors should be available. When the same machine is running Vista, Intel's Desktop Utilities software reports:

• Temperature
  • Processor Temperature (not sure if this is core 0 or core 1)
  • Motherboard Temperature
  • Motherboard Temperature (no idea how this differs from the previous one)
  • I/O Controller Hub (ICH) Temperature
  • Memory Controller Hub (MCH)

• Fan speed
  • Processor Fan
  • Chassis Outlet Fan

• Voltage
  • +12 Volts
  • +5 Volts
  • +3.3 Volts
  • +1.5 Volts
  • Processor Vccp

The BIOS setup screens report basically the same sensors, including two labeled "Motherboard Temperature" with no other information on how they differ. The single "Processor Temperature" is described in the BIOS as "CPU Die/Package? Temperature", so it's a little mysterious that the coretemp module is giving me two numbers here instead of one. Also, the BIOS reports two additional fan speeds: Chassis Inlet Fan and Auxiliary Fan, both 0. Presumably Intel's software hides these on the assumption that they are not connected to anything.

So the Linux sensor module suite is missing 5 voltage sensors, 2-4 fan speed sensors, and 3-4 temperature sensors. That's a lot of missing sensors! :-) Is there anything that I, or you, can do to bring more of these sensors online?

[ticket]

output of "lspci -vvv"

[ticket]

Drat, forgot to add Cc: <liblit@…>. (That's me, the creator of this ticket.) How do I add that after the fact? I see no way to modify the Cc: field.

[juergh]

What version of lm-sensors are you running? Can you send the full output of sensors-detect and also run SpeedFan? under Windows and send its output?

[ticket]

The box is running Fedora 8, with lm_sensors-2.10.4-2.fc8 and kernel-2.6.23.1-49.fc8 as packaged by the Fedora folks.

[ticket]

output of "sensors-detect"

[ticket]

output from SpeedFan? 4.33

[ticket]

SpeedFan? finds only the same two sensors that lm_sensors gets. That probably doesn't bode well, does it?

[juergh]

No, not too good. How about the output of sensors-detect? Your board supposedly has a Super-IO chip which should be detected by sensors-detect.

[ticket]

sensors-detect output is already attached to this ticket. The Suer-IO probe finds the following:

Trying family `National Semiconductor'...                   Yes
	Found `Nat. Semi. PC8374L Super IO Sensors'                 
	    (but not activated)

Why would the chip not be activated? Can I activate it somehow?

[ticket]

This ticket is starting to look a whole lot like  ticket #2266, by the way. Different motherboard but same 82801H (ICH8 Family) SMBus controller, same National Semiconductor PC8374L Super I/O chip detected by not activated, and same lack of any working sensors other than two CPU temperatures.

[ticket]

As I was told on lm-sensors irc cnannel, my chip (ticket 2266) is not supported (but may be in future). It is a complex chip from National Semiconductor which lacks proper documentation. Therefore to add support for it, a physical access to a board with this chip is needed + lots of time for someone to spend. At the moment there is nobody from lm-sensors team who could do that. It just needs too much time.

[juergh]

Only the HW monitoring part of the chip is not activated which implies that it's not being used. My guess is that your system uses the ICH8 for HW monitoring. We don't support these features yet. Sorry, looks like you're out of luck.

[ticket]

Drat, that's a shame. Thanks for looking at this. A note should be added to the "Status, Comments" field of the Devices page. There's already a table row for "82801H (ICH8)", but the blank "Status, Comments" field misleads the reader into thinking that this chip is fully supported.

Reopening this ticket as a reminder to update that table. (I hope that's not too pushy.) Please close this ticket again once the Devices page has been updated to reflect the current non-support of 82801H (ICH8) chips.

[ticket]

You may as well close/wontfix  ticket #2266 at the same time, by the way. It seems like the same issue.

[ticket]

Oh wait, it's not exactly the same: I have a 82801H (ICH8) chip, while  ticket #2266 has a Intel 82801IH (ICH9DH) chip. Similar but not the same.

[khali]

Replying to ticket:

Drat, that's a shame. Thanks for looking at this. A note should be added to the "Status, Comments" field of the Devices page. There's already a table row for "82801H (ICH8)", but the blank "Status, Comments" field misleads the reader into thinking that this chip is fully supported.

The current ICH8 entry on the Devices page is for the ICH8 as an SMBus master (it's in the BUS DRIVERS table). This is indeed fully supported, which is why there are no comments. What is missing is an entry for the ICH8 in the CHIP DRIVERS table.

[ticket]

Ah, I see. Subtle. I guess this ticket can be closed again, then. :-(

[khali]

I've added an entry for the ICH8 in the CHIP DRIVERS table, to clear up the confusion.

[ticket]

Looks good. Thanks.