Severity: serious
Tags: Patch
After looking at the calculations made in sensors3.conf causing the
problems I found that the difference between versions 2.10 and 3.0:
In version 2.10 the calculated values can be used in a subsequent
calculation, while it does not work for version 3.0 :-(, see code below:
compute in0 (24/14.7 + 1) * @ , @ / (24/14.7 + 1)
compute in5 (160/35.7)*(@ - in0) + @, (@ + in0*160/35.7)/(1+160/35.7)
As a workaround, I've changed the calculated 5V value with a fixed value
of 5V, see patch below for calculation of -12V and -5V values:
--- /etc/sensors3.conf 2007-12-20 08:07:03.000000000 +0100
+++ /etc/sensors3.conf~ 2007-12-04 09:35:44.000000000 +0100
@@ -985,16 +985,14 @@
label in4 "+12V"
label in5 "-12V"
label in6 "-5V"
-# Vs = (1+R1/R2)*Vin
+
compute in0 (24/14.7 + 1) * @ , @ / (24/14.7 + 1)
compute in2 (22.1/30 + 1) * @ , @ / (22.1/30 + 1)
compute in3 (2.8/1.9) * @, @ * 1.9/2.8
compute in4 (160/30.1 + 1) * @, @ / (160/30.1 + 1)
-# Vs = Vin + (R4/R3)*(Vin - V5)
- compute in5 (160/35.7)*(@ - 5) + @, (@ + 5 * 160/35.7)/ (1 +
160/35.7)
-# compute in5 (160/35.7)*(@ - in0) + @, (@ + in0 * 160/35.7)/ (1 +
160/35.7)
- compute in6 (36/16.2)*(@ - 5) + @, (@ + 5 * 36/16.2) / (1 +
36/16.2)
-# compute in6 (36/16.2)*(@ - in0) + @, (@ + in0 * 36/16.2) / (1 +
36/16.2)
+ compute in5 (160/35.7)*(@ - in0) + @, (@ + in0 * 160/35.7)/ (1 +
160/35.7)
+ compute in6 (36/16.2)*(@ - in0) + @, (@ + in0 * 36/16.2) / (1 +
36/16.2)
+
set in0_min 5 * 0.95
set in0_max 5 * 1.05
# What is your VTT? It is probably not this value...
On Mon, 2007-12-17 at 22:41 +0100, Svante Signell wrote:
> On Mon, 2007-12-17 at 22:22 +0100, Aurelien Jarno wrote:
> > severity 456774 normal
> > thanks
> >
> > Svante Signell a écrit :
> > > Package: lm-sensors
> > > Version: 1:3.0.0-4
> > > Severity: grave
> > > Justification: renders package unusable
> > >
> > > Some voltage readings are not reported by versions 3 of lm-sensors.
> > > Configuration files tried with versions 3 are both the
> > > old /etc/sensors.conf and the new /etc/sensors3.conf, same result, see
> > > below.
> >
> > Could you please tell me which values are not reported? From what I see
> > there are a few error messages that are not present in lm-sensors 2, but
> > all values are actually reported.
> >
> > Also this is the only chip known to have this problem, and the lm80 is a
> > relatively rare chip. I am therefore downgrading the severity.
>
> Is it so rare? I have an lm80 on more than one of my old computers,
> Pentium 2, Celeron 1-2, Pentium 3 based from around 1998-2001.
>
> See below for version 3: the negative voltages -12V and -5V are not
> reported.
>
> > > With lm-sensors 1:2.10.1-3 (latest from stable):
> > > (No problems with any of the 2.x versions)
> > > lm80-i2c-0-28
> > > Adapter: SMBus PIIX4 adapter at 5000
>
> > > -12V: -12.06 V (min = -12.61 V, max = -11.40 V)
> > > -5V: -5.15 V (min = -5.25 V, max = -4.74 V)
>
> > >
> > > With lm-sensors3 (currently 1:3.0.0-4):
> > > lm80-i2c-0-28
> > > Adapter: SMBus PIIX4 adapter at 5000
>
> > > ERROR: Can't get value of subfeature in5_input: No such subfeature known
> > > ERROR: Can't get value of subfeature in5_max: No such subfeature known
> > > ERROR: Can't get value of subfeature in5_min: No such subfeature known
> > > -12V: +0.00 V (min = +0.00 V, max = +0.00 V)
> > > ERROR: Can't get value of subfeature in6_input: No such subfeature known
> > > ERROR: Can't get value of subfeature in6_max: No such subfeature known
> > > ERROR: Can't get value of subfeature in6_min: No such subfeature known
> > > -5V: +0.00 V (min = +0.00 V, max = +0.00 V)
>
> > > Installed:
> > > ii libsensors3 1:2.10.5-3
> > > library to read temperature/voltage/fan sensors
> > > ii libsensors4 1:3.0.0-4
> > > library to read temperature/voltage/fan sensors
> > > ii lm-sensors 1:3.0.0-4
> > > utilities to read temperature/voltage/fan sensors
> > >
> > >
> > >
> > >
> >
> >
