[lm-sensors] hp dc7900

[lm-sensors] hp dc7900

[Grzegorz Sójka]

Hi there,

I'm using HP dc7900 Small Form Factor Business PC as a small home 
server. Since the machine runs 24/7 I would like it to automatically 
shut down in case of overheating or a fan failure. I managed to obtain 
temperatures for both CPU cores (via coretemp). Unfortunately I'm not 
able to monitor fans speed. The sensors-detect script detected also:

Trying family `SMSC'...                                     Yes
Found unknown chip with ID 0x0b00

Unfortunately I have no idea what is it and how to use it.

Does anyone know how to configure lm_sensors to obtain fans speed 
readings on my machine??

-- 
Regards
Greg

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Re: [lm-sensors] hp dc7900

[Jean Delvare]

Hi Grzegorz,

On Thu, 13 Mar 2014 20:44:53 +0100, Grzegorz Sójka wrote:
> I'm using HP dc7900 Small Form Factor Business PC as a small home 
> server. Since the machine runs 24/7 I would like it to automatically 
> shut down in case of overheating or a fan failure. I managed to obtain 
> temperatures for both CPU cores (via coretemp). Unfortunately I'm not 
> able to monitor fans speed. The sensors-detect script detected also:
> 
> Trying family `SMSC'...                                     Yes
> Found unknown chip with ID 0x0b00
> 
> Unfortunately I have no idea what is it and how to use it.
> 
> Does anyone know how to configure lm_sensors to obtain fans speed 
> readings on my machine??

I think we've seen this ID many times in the past, but we don't know
what chip it is and/or we don't have a datasheet. If you can have a
physical look at the board and find the chip name, that would be a
start.

Not all LPC chips include hardware monitoring features though. Does the
BIOS display any fan speed on this system?

-- 
Jean Delvare
SUSE L3 Support

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Re: [lm-sensors] hp dc7900

[Jean Delvare]

Hi Grzegorz,

Please keep the list in Cc.

On Sun, 16 Mar 2014 11:33:51 +0100, Grzegorz Sójka wrote:
> On 03/14/14 07:53, Jean Delvare wrote:
> > I think we've seen this ID many times in the past, but we don't know
> > what chip it is and/or we don't have a datasheet. If you can have a
> > physical look at the board and find the chip name, that would be a
> > start.
> The is a lot of tiny chips on the MB so small that its extremely 
> difficult to read the symbols (without disassemble). What should I look for?

The Super-I/O shouldn't be that small, actually it is generally one of
the largest chips on the board. You'd be looking for a chip with "SMSC"
clearly readable on top of it, like:
http://i00.i.aliimg.com/photo/v0/559896002/IC_CHIP_LPC47N350_NE_SMSC_QFP.jpg_220x220.jpg

> > Not all LPC chips include hardware monitoring features though.
> The PSU and CPU fans speeds are controlled according to CPU and PSU 
> temperatures. There is even a king of simple adjustment in the BIOS. 
> According to the specs both sense and controlling signals of the PSU fan 
> are connected directly to the MB. So there is some electronics on the MB 
> capable of measuring temperatures and adjusting fan speeds and probably 
> measuring fan speeds.

OK, that's thin, but that's a start.

> > Does the BIOS display any fan speed on this system?
> The BIOS does not show any temp or fan readings. Although, the machine 
> supports remote management via intel vPro. Is is possible that sensors 
> are only exposed to remote management hardware??

Everything is possible.

-- 
Jean Delvare
SUSE L3 Support

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Re: [lm-sensors] hp dc7900

[Grzegorz Sójka]

On 03/16/14 12:17, Jean Delvare wrote:
> Hi Grzegorz,
>
> Please keep the list in Cc.
OK. Sorry.
>
> On Sun, 16 Mar 2014 11:33:51 +0100, Grzegorz Sójka wrote:
>> On 03/14/14 07:53, Jean Delvare wrote:
>>> I think we've seen this ID many times in the past, but we don't know
>>> what chip it is and/or we don't have a datasheet. If you can have a
>>> physical look at the board and find the chip name, that would be a
>>> start.
>> The is a lot of tiny chips on the MB so small that its extremely
>> difficult to read the symbols (without disassemble). What should I look for?
>
> The Super-I/O shouldn't be that small, actually it is generally one of
> the largest chips on the board. You'd be looking for a chip with "SMSC"
> clearly readable on top of it, like:
> http://i00.i.aliimg.com/photo/v0/559896002/IC_CHIP_LPC47N350_NE_SMSC_QFP.jpg_220x220.jpg
I did not found anything like this. I did not disassemble the pc. Its 
SFF so some parts of MB are covered by other components. What I was able 
to read is the markings on the following chip:

WINBOND
WPCD376HAKFG
917SG291580312FG

Does it help or should I look for something else?

-- 
Pozdrawiam
Grzesiek



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Re: [lm-sensors] hp dc7900

[Rudolf Marek]

> I did not found anything like this. I did not disassemble the pc. Its SFF so
> some parts of MB are covered by other components. What I was able to read is the
> markings on the following chip:
>
> WINBOND
> WPCD376HAKFG
> 917SG291580312FG

This is a superIO chip some nuvoton report says it is SUPER I/O
for DESKTOP. Maybe there are more chips for hw monitor?

Thanks
Rudolf




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Re: [lm-sensors] hp dc7900

[Jean Delvare]

On Sun, 16 Mar 2014 19:33:03 +0100, Grzegorz Sójka wrote:
> On 03/16/14 12:17, Jean Delvare wrote:
> > The Super-I/O shouldn't be that small, actually it is generally one of
> > the largest chips on the board. You'd be looking for a chip with "SMSC"
> > clearly readable on top of it, like:
> > http://i00.i.aliimg.com/photo/v0/559896002/IC_CHIP_LPC47N350_NE_SMSC_QFP.jpg_220x220.jpg
> I did not found anything like this. I did not disassemble the pc. Its 
> SFF so some parts of MB are covered by other components. What I was able 
> to read is the markings on the following chip:
> 
> WINBOND
> WPCD376HAKFG
> 917SG291580312FG
> 
> Does it help or should I look for something else?

It is completely possible that this is the chip with ID 0x0b00. We
guess vendor IDs based on other chips we know, but vendors can trade
schematics and we've seen this in the past.

Anyway we don't have a datasheet or even the start of a clue for that
chip either, so I'm sorry but there's nothing we can do.

-- 
Jean Delvare
SUSE L3 Support

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Re: [lm-sensors] hp dc7900

[Rudolf Marek]

Hi all,

According to technical reference guide the SIO is responsible for temp 
monitoring and it is that WPCD376H chip. Also there is a mention of some BIOS 
call to get temp status (using real/prot mode call)

http://static.highspeedbackbone.net/pdf/HP%20Compaq%20dc7900%20Series%20Business%20PC%20Service%20Hardware%20Reference%20Guide.pdf

Possibly way would be to reverse engineer the call to see what is going on. But 
this is just a start of uncertain journey.

Thanks
Rudolf


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Re: [lm-sensors] hp dc7900

[Guenter Roeck]

On 03/16/2014 03:13 PM, Rudolf Marek wrote:
> Hi all,
>
> According to technical reference guide the SIO is responsible for temp monitoring and it is that WPCD376H chip. Also there is a mention of some BIOS call to get temp status (using real/prot mode call)
>
> http://static.highspeedbackbone.net/pdf/HP%20Compaq%20dc7900%20Series%20Business%20PC%20Service%20Hardware%20Reference%20Guide.pdf
>
> Possibly way would be to reverse engineer the call to see what is going on. But this is just a start of uncertain journey.
>

I asked Nuvoton for a datasheet. Worst case we won't get one,
so I thought it is at least worth a try.

Guenter


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