lm90 driver

lm90 driver

[Jean Delvare]

> I see on the new drivers page that an lm90 driver is written.  I have
> a Soyo KT400 Dragon Ultra Black edition with that chip on it and would
> be glad to assist in testing if you still need help.  I am not a
> programmer byu any stretch of the imagination, but I would classify
> myself as a power user and can install software from source.  Let me
> know if there are any tasks that need to be done.

Yes, testers are still wanted. In order to test the driver, you'll have
to install the CVS version of both I2C and LM Sensors. If you don't use
other I2C-related devices (frame grabbers and TV tuners are, among
others), simply follow the instructions here:
http://secure.netroedge.com/~lm78/download.html#cvs
It's as easy as "make && make install" for i2c and "make && make install
&& ldconfig" for LM Sensors. Then, run "sensors-detect" and it should
detect your LM90.

If you do use other I2C-related devices, follow the more detailed
installation guide here:
http://www.ensicaen.ismra.fr/~delvare/devel/i2c/

(If you don't know, try method 1 first, since it's easiest; if you
encounter problems, move to method 2.)

Let us know how the driver works for you!
Thanks.

-- 
Jean Delvare
http://www.ensicaen.ismra.fr/~delvare/

lm90 driver

[Jean Delvare]

> > Yes, testers are still wanted. In order to test the driver, you'll
> > have to install the CVS version of both I2C and LM Sensors. If you
> > don't use other I2C-related devices (frame grabbers and TV tuners
> > are, among others), simply follow the instructions here:
> > http://secure.netroedge.com/~lm78/download.html#cvs
> > It's as easy as "make && make install" for i2c and "make && make
> > install&& ldconfig" for LM Sensors. Then, run "sensors-detect" and
> > it should detect your LM90.
> > 
> > If you do use other I2C-related devices, follow the more detailed
> > installation guide here:
> > http://www.ensicaen.ismra.fr/~delvare/devel/i2c/
> > 
> > (If you don't know, try method 1 first, since it's easiest; if you
> > encounter problems, move to method 2.)
> > 
> > Let us know how the driver works for you!
> 
> Thank you for the detailed instructions.  I am a Mandrake user, and it
> looks like lm_sensors2.8 is in Cooker, so it is most likely that the
> new Mandrake kernel is already patched to the new I2C.  If I can get
> Cooker running (it should become 9.2 in a few weeks as Cooker is
> tagged rc1 right now) on my KT400 machine, I am thinking I'll just try
> installing lm_sensors from cvs and see how it goes.

It's great that 2.8.0 is already in Cooker :) However, I'm not sure
it'll be sufficent for an out-of-the-box installation of lm_sensors CVS.
We have a new function (i2c_delay) in i2c CVS, which is used by some
(most) bus drivers in lm_sensors CVS, so I guess you'll have some
problems here. I'd recommend that you install i2c CVS prior to
lm_sensors CVS. If Cooker's kernel is already patched, i2c CVS should
install like a charm and will not cause any problem to other, and
lm_sensors CVS will then work OK too.

> I'll let you know how it goes.

Yes, please do :)
Thanks.

-- 
Jean Delvare
http://www.ensicaen.ismra.fr/~delvare/

lm90 driver

[Jean Delvare]

> Hi Jean.  I just got 2.8.1 installed successfully on my mandrake 9.2 
> installation and all appears to be working properly for the lm90
> driver.  The temp readings I am getting on my Athlon XP clocked at
> 2GHz are about what my BIOS reports at boot (60C).  Sensors reports
> 58C at idle and 67-68C at full load.  I was getting a socket reading
> of 40C from the it87 sensor at full load (36C at idle), so I got a
> difference that was within my range of expectation.  Also, the temps
> change quite rapidly when going from full load to idle or vice-versa,
> which I would also expect from reading the diode.
> 
> Also the lm90 reports the board temp at 30C while the it87 reported it
> at 25C.  
> From reading the docs, I believe the lm90 is reading it's own temp,
> so I would expect it to be more accurate than the thermistor reading
> of the it87.

I'm glad it works so well :) Just to make sure I understand it well, the
it87 was on a completely different system, right?

> 2.8.0 shipped with mandrake 9.2, and the lm90 module reported 'to be
> written' with that version, so I was glad to get 2.8.1 working so
> easily (still screwed up my tv card though).

We suspected that the LM90 would be found on a number of motherboards,
so we included detection for it (as well as half a dozen of similar
chips) to sensors-detect. Each time someone reports he/she needs one of
these "to-be-written" drivers, we write the driver (or add support to an
existing driver). This make it easy to support only chips that are
really used (thus keeping drivers small), while still letting people
know that we are able to support some other ones if needed.

> I may go back to the
> packaged version just to be able to use my tv card and hold off on
> using the new sensor until a cooker kernel comes out with 2.8.1 fully
> integrated.  I will spend a little time getting it to work though
> before I resort to that.
> (...)
> Just to follow up, I got it (the tv card) working.  It turns out the
> problem was the permissions on my video device, not anything to do
> with lm_sensors.

OK, good to know. Since your system was working OK with 2.8.0, I was
surprised that you would have problems with 2.8.1. Although 2.8.1 has
the same compatibility issues as 2.8.0 does, once it has been solved for
2.8.0, there's no reason it wouldn't work with subsequent versions.

Thanks a lot for your report, it's really great to have positive
feedback from times to times ;)

-- 
Jean Delvare
http://www.ensicaen.ismra.fr/~delvare/

lm90 driver

[Jean Delvare]

> > I'm glad it works so well :) Just to make sure I understand it well,
> > the it87 was on a completely different system, right?
>
> No.  I have a Soyo Dragon Ultra (KT400) that has both.

Oh, OK, this make sense now. The LM90 and the IT87 must be measuring the
temperature of two different points of the motherboard. Temperature
varies a lot in a computer case, so that's no wonder both sensors return
different values.

> As I said in my supplemental e-mail, after about 30 seconds of
> troubleshooting on the tv card issue, I realized the permissions on my
> video device were wrong, so there is no problem.  The only problem I
> did have was that Mandrake installs lm_sensors into /usr/lib and the
> default location when installing from source is /usr/local/lib.  So I
> had to add that path to /etc/ld.so.conf before running ldconfig.

That's a rather usual issue. Most distributions don't really expect
people to install things to /usr/local because all "official" packages
use /usr. Still I believe they *should* add /usr/local/lib to their
ld.so.conf file, so that new users trying to install a piece of software
by themselves for the first time do not have to struggle with libraries
not being "detected".

Thanks for the details. Feel free to contact us later if you have
problems or suggestions WRT sensors on your Linux systems.

-- 
Jean Delvare
http://www.ensicaen.ismra.fr/~delvare/

lm90 driver

[Greg Meyer]

On Sunday 26 October 2003 11:03 am, you wrote:
> > No.  I have a Soyo Dragon Ultra (KT400) that has both.
>
> Oh, OK, this make sense now. The LM90 and the IT87 must be measuring the
> temperature of two different points of the motherboard. Temperature
> varies a lot in a computer case, so that's no wonder both sensors return
> different values.

The it87 also measures the socket temp with a thermister, as well measuring 
fan speeds and and voltages.

Thanks again.
-- 
Regards,
Greg