There's a later version of the driver at http://www.peakin.com/download/asc76xx-2.6.21.patch If you want to try it. More comments in line... > -----Original Message----- > From: lm-sensors-bounces at lm-sensors.org > [mailto:lm-sensors-bounces at lm-sensors.org] On Behalf Of > Sebastian Flothow > Sent: Friday, August 03, 2007 3:48 PM > To: lm-sensors > Subject: Andigilog aSC7621 on Intel 975XBX2 - > mostly working > > Hi, > > I obtained an Intel 975XBX2 Mainboard a while ago, and finally got > round to have a look at the sensors. I'm using the asc7xxx driver I > found in the list archives (posted by George T. Joseph in December), > which compiles, loads and detects the aSC7621 just fine. > The machine is equipped with an Intel Core 2 Duo E6600 and is running > Gentoo Linux with a Xen-patched 2.6.16.49 kernel (Gentoo package > xen-sources-2.6.16.49); sensors is version 2.10.3 with libsensors > version 2.10.3. > > sensors isn't quite happy though, the output ist just: > > | asc7621-i2c-0-2e > | Adapter: SMBus I801 adapter at 2000 > > So I suppose it doesn't recognise the aSC7621 as a valid sensor chip, > but there doesn't appear to be a --force option or some such > to get it > to read the values anyway. Any suggestions on this? I'm way behind on getting the driver accepted and supported in libsensors, sorry. Hopefully by the end of August. > > Meanwhile, I had a look at the input files in > /sys/devices/pci0000:00/0000:00:1f.3/i2c-0/0-002e: > > | magrathea 0-002e # grep . *input > | fan1_input:360 > > This is the CPU fan (4 wires), reading is correct. > > | fan2_input:364 > > Intel labels this one as 'auxiliary' or 'auxiliary rear' fan, > 4 wires, > reading correct. > > | fan3_input:301 > > Front fan, 3 wires. The reading sometimes jumps to twice this value, > and then back again after a while. I found that this fan will > speed up > a bit when calling up the hardware monitoring screen in the BIOS, > probably because pulse stretching gets enabled, yet it doesn't do so > when loading the driver - maybe the driver ought to set some bit for > pulse stretching in the aSC7621? The BIOS shows this one with > about 840 > rpm. > > | fan4_input:354 > > Rear fan, 3 wires. Same as fan3, though this one doesn't change its > reading when stopping the fan, yet goes to 0 when disconnecting it > entirely. However, this likely an issue of the fan (maybe pulses in > supply voltage propagating to the tach output). About 720 rpm in BIOS. I'll check the fan readings but I'm not seeing any problems on 3 different machines. Maybe because my fans run at a somewhat higher speed. > > Next, the voltages with the corresponding BIOS labels: > | in0_input:1533 > > V1.5 > > | in1_input:1187 > > Vccp, BIOS says 1.300 though. The vccp reading is probably correct and the result of C1E kicking in. This reduces the voltage and multiplier when the CPU is idle. The CPU runs at it's max voltage when in the BIOS screens which is why you see 1.300 there. Try loading the CPU and take the reading again. > > | in2_input:3293 > > V3.3 > > | in3_input:4986 > > V5.0 > > | in4_input:12077 > > V12.0 > > Except for Vccp, the readings are close to what the BIOS shows. > > > | peci_temp1_input:-28481 > | peci_temp2_input:-92501 > | peci_temp3_input:-31110 > | peci_temp4_input:-29297 > > If I'm understanding PECI correctly, these are CPU temperatures > relative to the tripping point, and hence negative. Is this correct? > Assuming it is, 1 2 and 4 seem roughly reasonable (or do > they? I ought > to look up the 'zero' temperature for the E6600), however, > these values > don't change at all, even after several days. Is there some way to > force a refresh? PECI has to be enabled first and when it is, only peci_temp1 is valid on this board. The E6600's have their trip point at 85C so the output is relative to that number. The documentation for the latest version of the driver explains this better. > > Now, time for some cooling spray to locate the other temp sensors... > > | temp1_input:33750 > > This is the CPU temperature. As the aSC7621 has diode inputs, > does this > mean the CPU has a traditional diode in addition to that PECI stuff? > The reading is somewhat lower than the BIOS shows, but that > may be due > to the BIOS code not making use of some power saving features. Correct on both counts. > > | temp2_input:43500 > > This is the aSC7621 itself, located close to the CPU socket, well > within the air flow coming from the CPU heatsink. Reading > matches BIOS. > > | temp3_input:41750 > > A diode between the RAM sockets. Matches BIOS. > > | temp4_input:0 > > What's this? According to Documentation/hwmon/asc7xxx the aSC7621 > supports two remote diodes and its internal one - where is the fourth > reading supposed to come from? The chip has 4 temperature zones whose sources can be reassigned. By default, zone 4 is unassigned but you can manually assign it to one of the peci temps for instance. Again, the documentation from the latest driver explains this better and the driver allows you to do the reassignment. > > > Regards, > Sebastian > > -- > Sebastian Flothow > sebastian at flothow.de > > Because it reverses the logical flow of conversation. > > Why is top posting frowned upon? > > > _______________________________________________ > lm-sensors mailing list > lm-sensors at lm-sensors.org > http://lists.lm-sensors.org/mailman/listinfo/lm-sensors >
