[lm-sensors] VT1211: wrong vid, vcore

cilly cilly at cilly.mine.nu
Tue Jul 24 23:58:51 CEST 2007


On Jul 24, 2007, at 11:44 PM, Juerg Haefliger wrote:

Hi Juerg,

thanks a lot for your help!

> Please also reply to the list. Other people might be interested as  
> well.

Yes, I realized it after sending, missing Reply-To-Header. So I  
resent it to the list, too.

> Yeah, 1.250V for VRM8.5 means that all the VID inputs read 0. I don't
> think they are connected. On the other hand now the vid and VCore kind
> of match :-) But VCore should really be 1.4V for a Nehemiah in an EBGA
> package. The only way to confirm this is to hook up a voltmeter to the
> Vcore voltage.

VRM9.1 lists 1.850V so VID inputs read 0.

> Interesting, you don't have a 'compute in2' line (which is correct)
> but the in2 voltage doesn't return 1.4V. So that leaves only two
> conclusions:
> 1) The reported Vcore of 1.22V is the correct value. If you do have a
> voltmeter, please check.

I do have an voltmeter, but I am not going to measure, since it  
really am afraid of killing the cpu of a short.

> 2) There are scaling resistors on the Vcore input pin of the vt1211.
> Assuming Vcore should be 1.4V, you can add the following compute line:
>
> compute in2  @ * (1 +  1.47 / 10),  @ / (1 +  1.47 / 10)

Your computing line is working:

vt1211-isa-6000
Adapter: ISA adapter
+3.3V:     +3.30 V  (min =  +3.14 V, max =  +3.47 V)
+2.5V:     +2.38 V  (min =  +2.38 V, max =  +2.63 V)   ALARM
VCore:     +1.40 V  (min =  +1.35 V, max =  +1.44 V)
+5V:       +4.66 V  (min =  +4.51 V, max =  +5.49 V)
+12V:     +11.49 V  (min = +10.77 V, max = +13.21 V)
+3.3V:     +3.28 V  (min =  +3.13 V, max =  +3.46 V)
Case Fan:    0 RPM  (min = 3006 RPM, div = 2)
CPU Fan:     0 RPM  (min = 3006 RPM, div = 2)
CPU Temp:  +45.4 °C  (high =   +85 °C, hyst =   +79 °C)
Int Temp:  +61.0 °C  (high =   +65 °C, hyst =   +60 °C)
vid:      +1.250 V  (VRM Version 8.5)

Now other voltages are computed correctly.

Well, the values still might need some adjustments, since I can't  
believe, that 2.5V is 2.38 and 12V is 11.49. What do you think about it?






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