[lm-sensors] Testing LM-Sensor Support of SCH5127 in Acer easyStore H340
jrickman at myamigos.us
Mon Nov 29 16:51:08 CET 2010
> Hi Jeff,
> On Mon, 29 Nov 2010 00:20:44 -0600 (CST), Jeff Rickman wrote:
>> Providing some feedback now that SCH5127 support is "mainline" in
>> LM_Sensors; no "force_id" option required.
>> [root at anas-01 ~]# service lm_sensors status
>> Adapter: ISA adapter
>> Core 0: +21.0°C (crit = +90.0°C)
>> Adapter: ISA adapter
>> V+1.5: +1.42 V (min = +1.35 V, max = +1.65 V)
>> 5VTR: +4.78 V (min = +4.50 V, max = +5.48 V)
>> VBAT: +3.32 V (min = +0.00 V, max = +4.38 V)
>> V+5: +5.09 V (min = +0.00 V, max = +6.72 V)
>> Vccp: +1.48 V (min = +1.35 V, max = +1.49 V)
>> VCC: +3.33 V (min = +0.00 V, max = +4.38 V)
>> VTR: +3.24 V (min = +0.00 V, max = +4.38 V)
>> Side Fan: 2250 RPM (min = 600 RPM)
>> MCH Fan: 5137 RPM (min = 4500 RPM)
>> CPU Temp: +47.6°C (low = +20.0°C, high = +60.0°C)
>> SYS Temp: +35.1°C (low = +20.0°C, high = +60.0°C)
>> Here is my "/etc/sensors.d/local.conf" file:
>> [root at anas-01 ~]# cat /etc/sensors.d/local.conf
>> # libsensors configuration file
>> # -----------------------------
>> chip "sch5127-isa-0870"
>> label in0 "V+1.5"
>> label in1 "5VTR"
>> label in2 "VBAT"
>> label in3 "V+5"
>> label in4 "Vccp"
>> label in5 "VCC"
>> label in6 "VTR"
>> # All inputs are listed here in order as displayed in BIOS.
> This is often the case, but not always. So this should only be used as
> a last resort decision factor.
I did attempt to match by voltage values between "sensors" and BIOS.
>> # Values seen by "sensors" closely match values seen in BIOS.
>> label fan1 "Side Fan"
>> label fan2 "MCH Fan"
>> ignore fan3
>> label temp1 "CPU Temp"
>> ignore temp2
>> # label temp2 "SIO Temp"
> This is an internal sensor, it should always be present and correct, so
> why would you ignore it?
The value is high...very high. Does a flucuating value between 120 and 128
Celsius make sense?
>> label temp3 "SYS Temp"
>> compute in0 (@ * 0.8), (@ / 0.8)
Removing this compute line shows a fairly stable in0 value of 1.78
> This is extremely unlikely. While it is frequent to scale down voltage
> inputs so that the results fits in the ADC range, there is no point in
> scaling a voltage up. Especially not by a factor so close to 1: the
> error incurred by the operation would far outweigh the resolution
> improvement at the ADC level. Not to mention that scaling up needs an
> amplifier so it's not a cheap operation - no PC vendor would do this.
> So, I seriously doubt that in0 is +1.5V.
> In fact, the SCH5127 already has internal scaling resistors on most
> voltage inputs, so if the voltage lines are wired correctly, only
> voltages over +3.3V should need external scaling. These voltages (+5V
> and 5VTR in your case) should be wired to in3 and in4 per chip design,
> to limit the number of inputs which require scaling. VBAT, VCC and VTR
> should be on in2, in5 and in6, which matches your findings. Which means
> that +1.5V and Vccp should be on in0 and in1 (or vice-versa.)
I will dig out this chassis and install a video card in it so I can access
the BIOS values. I can get the system to boot very fast (<=1m boot to
login prompt) so checking "sensors" values against BIOS values is
> Now it is of course possible that Acer did things differently, either
> for pin proximity reasons, or just because they are bad ;)
They can be bad so anything is possible ;)
> Assuming that your CPU does frequency and voltage scaling based on
> load, you should try to put some load on the CPU and check which
> voltage input raises. This would be Vcore (Vccp) and should require no
> scaling. If you can figure that one out, it might help sort out the
I will need to find some type of CPU stress program. Even moving 250,000
files (about 70+GB) between hard drives inside the chassis using Rsync
only placed <5% load on the CPU.
>> compute in1 (@ * 4), (@ / 4)
>> compute in3 (@ * 4.5), (@ / 4.5)
>> set in0_min 1.5 * 0.90
>> set in0_max 1.5 * 1.10
>> set in1_min 5.0 * 0.90
>> set in1_max 5.0 * 1.10
>> set in4_min 1.50 * 0.90
>> set in4_max 1.50 * 1.10
>> set fan1_min 600 <- per fan vendor
> You're missing a # before your comment.
Comment added during "cut & paste" into email....
>> set fan2_min 4500
>> set temp1_min 20
>> set temp1_max 60
>> set temp2_min 20
>> set temp3_min 20
>> set temp3_max 60
> Jean Delvare
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