Hi Jean, On Wed, Mar 21, 2007 at 05:21:04PM +0100, Jean Delvare wrote: > I am the author of the f71805f driver. First off, thanks for your time spent on this driver, and thanks for your quick response. > On Wed, 21 Mar 2007 11:51:03 -0400, Forest Bond wrote: > > Is it possible that the diode is not characterized correctly? > > Yes, this is possible. Hardware monitoring chips are typically meant to > be used with one given type of thermal diode, and where a different > type is used, the measurements have to be corrected. If the correction > is a simple offset, it can be done by the F71805F itself, otherwise it > must be done in software. > Another possibility is that this is a labelling issue, and one of the > other two temperatures is actually the CPU temperature. You said that > "the other two temperatures appear to be reasonable" but you didn't > give us the actual numbers. Please copy the output of "sensors" so that > we get an idea. You also did not tell us what CPU model it was. Well, the other two temperatures happen to be giving me room-temperature readings (the mainboard is not in a case), and this is the one that rises quickly when I unplug the CPU fan :) sensors output and /proc/cpuinfo are attached. > > I have a technical contact at Jetway that may be able to assist. Should I > > pursue this as a BIOS issue, or ought I seek information with regard to how > > the circuit is physically wired? > > If you could know for sure which temperature channel is connected to > what, it would help. You might get a first idea by checking in the > BIOS, and comparing the hardware monitoring information there with what > "sensors" displays. This BIOS does display temperature and voltage information at boot time. Is your intent simply for me to match up the readings with those read by sensors? I am confident that the reading in question is, in fact, the CPU temperature. Or do I misunderstand? > You can also dump the contents of the F71805F chip to find out if > temperature offsets have been set by the BIOS. Assuming that the > F71805F lives at the standard address 0x290, you would run: > > isadump 0x295 0x296 > > And look at the values of registers 0x90, 0x91 and 0x92. Output of "isadump 0x295 0x296" is attached. I am not quite sure how to interpret that, but I belive it is indicating that an offset of 0x5d is being applied to temp1, while temp2 and temp3 are being read as-is. (Assuming the chip is indeed at that address). Thanks again, Forest -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: Digital signature Url : http://lists.lm-sensors.org/pipermail/lm-sensors/attachments/20070321/78f49085/attachment.bin
