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tuxmagi
n00b
Joined: 22 Oct 2004
Posts: 68
Location: Providence, RI
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 Posted: Fri Jul 22, 2005 2:09 pm Post subject: lm_sensors Biostar NF4UL-A9 |
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| Has anybody gotten lm_sensors correctly configured for a Biostar NF4UL-A9 motherboard or know how to do so? I got lm_sensors installing and sending output, however some of the outputs are ridiculous, such as: -12V: +3.93V, -5V: +4.03V, CPU Temp: +127C, M/B Temp: +127C, Temp3: +32C. Those are the most notable odd readouts. However, other readouts such as the cpu fan speed work perfectly. Any ideas or suggestions at all are most appreciated. |
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54813
Location: 56N 3W
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| Posted: Fri Jul 22, 2005 2:56 pm Post subject: |
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tuxmagi,
Read the comments in /etc/sensors.conf and look through for your motherboard being listed under your sensor type. The comments tell you what you need to do but you may find all thats needed to to move some comment marks (#) around.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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tuxmagi
n00b
Joined: 22 Oct 2004
Posts: 68
Location: Providence, RI
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| Posted: Fri Jul 22, 2005 8:28 pm Post subject: |
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| I tried grepping /etc/sensors.conf for "biostar", "NF4UL-A9", and "nforce4", and none of the returned any results. I have also tried all combinations of the suggestions in the "it87" section, and those all produce similar results. |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54813
Location: 56N 3W
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| Posted: Fri Jul 22, 2005 9:45 pm Post subject: |
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tuxmagi,
You need to run when you fiddle with the arithmetic.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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widan
Veteran
Joined: 07 Jun 2005
Posts: 1512
Location: Paris, France
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| Posted: Fri Jul 22, 2005 10:14 pm Post subject: Re: lm_sensors Biostar NF4UL-A9 |
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| tuxmagi wrote: | | some of the outputs are ridiculous, such as: -12V: +3.93V, -5V: +4.03V |
On some motherboards the negative voltages aren't monitored (almost nothing uses them in a modern PC, so they're not that important) To be sure, comment their "compute" line. If the voltage now reads about 4V, the input is not connected.
| tuxmagi wrote: | | CPU Temp: +127C, M/B Temp: +127C, Temp3: +32C |
Maybe CPU and M/B (chipset) use diodes instead of thermistors. Try with "set sensor1 3" in the proper section of /etc/sensors.conf, and see if the readings look better. ("set sensor2 3" for the M/B temperature). When changing sensor types, you need to run "sensors -s" to write the change to the monitoring chip. |
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54813
Location: 56N 3W
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| Posted: Fri Jul 22, 2005 10:20 pm Post subject: |
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widan,
The negative voltages are still monitored. The sensor chip can only accept a positive input voltage though, so there has to be some fiddling done with the input resistors. All the inputs have to be scaled to something between 0v and 5v in the electronics, then scaled again by lm-sensors back to the right answers.
As you sey, sensor tyoe make a big difference.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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widan
Veteran
Joined: 07 Jun 2005
Posts: 1512
Location: Paris, France
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| Posted: Sat Jul 23, 2005 12:01 pm Post subject: |
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Negative voltages aren't always monitored. There is an entry about that in lm_sensors FAQ.
For example on my K8N-E Deluxe (with IT8712 monitoring chip), they are not connected. I had weird voltages too, so I investigated. If I remove the "compute" entries in sensors.conf, the "weird" entries all have a raw value of 4.08V:
| Code: | Vcore: +1.10 V (min = +0.93 V, max = +1.62 V)
Vcore2: +4.08 V (min = +4.08 V, max = +4.08 V) ALARM
+3.3V: +3.28 V (min = +3.04 V, max = +3.57 V)
+5V: +2.94 V (min = +2.74 V, max = +3.22 V)
+12V: +2.91 V (min = +2.77 V, max = +3.25 V)
-5V: +4.08 V (min = +4.08 V, max = +4.08 V) ALARM
-12V: +4.08 V (min = +4.08 V, max = +4.08 V) ALARM
Stdby: +4.08 V (min = +4.08 V, max = +4.08 V) ALARM
VBat: +4.08 V |
In the it87 driver, "raw" voltage values (without lm_sensors computations) are computed as 16 * register_value. Those registers have a range from 0x00 to 0xff. And 0xff (255) * 16 = 4080, and you get 4.08V. If it was connected to a voltage divider network, the output voltage of the divider would be in the middle of the measurable range (like the +5V and +12V are), not at the maximum. So the inputs are probably not connected (or even more probably pulled up to 5V, and the ADC in the it87 returns the maximum value it can, ie 0xff).
I'm not saying that this is the case on all motherboards, but there are some boards that do not monitor the negative voltages. |
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verlane24
Tux's lil' helper
Joined: 18 May 2004
Posts: 75
Location: Springfield, MO
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| Posted: Wed Mar 01, 2006 2:31 am Post subject: |
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Sorry to dig up an old thread, but I have a Biostar n4sli-a9 that's giving me the same readings as tux magi.
Anyone have a working sensors.conf for this board? I have all the necessary modules compiled. I have tried multiple reconfigs of sensors.conf to no avail. Here's the closest I have gotten:
| Code: |
upstairs etc # sensors
it8712-isa-0290
Adapter: ISA adapter
VCore 1: +1.39 V (min = +1.42 V, max = +1.57 V) ALARM
VCore 2: +1.52 V (min = +2.40 V, max = +2.61 V) ALARM
+3.3V: +3.26 V (min = +3.14 V, max = +3.47 V)
+5V: +4.97 V (min = +4.76 V, max = +5.24 V)
+12V: +11.65 V (min = +11.39 V, max = +12.61 V)
-12V: +1.23 V (min = -12.63 V, max = -11.41 V) ALARM
-5V: +0.01 V (min = -5.26 V, max = -4.77 V) ALARM
Stdby: +4.78 V (min = +4.76 V, max = +5.24 V)
VBat: +3.01 V
fan1: 3125 RPM (min = 0 RPM, div = 8)
fan2: 2220 RPM (min = 3013 RPM, div = 8)
Temp1: +93 C (low = +15 C, high = +55 C) sensor = diode
Temp2: +93 C (low = +15 C, high = +70 C) sensor = diode
CPU Temp: +37 C (low = +15 C, high = +70 C) sensor = diode
vid: +1.55 V
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The voltage numbers are correct, and the CPU idle temp looks about right too(temp 3). But it does not seem like it moves enough when the cpu is maxed out. The hottest it reads is 47C. This is an AMD64 3200+. Obviously the temp1 and 2 are incorrect, but this is kind of a cheapy board, and it does not show a MB temp in bios either, so maybe it just has 1 temp sensor. Biostar has NOTHING in the way of tech docs on their website.
Anyone have any ideas? |
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