Re: [Freeipmi-devel] can't read tempeature info

[Franco Brasolin]

Hi Albert,

Il 24/08/2011 19:42, Albert Chu ha scritto:
> Hi Franco,
>
> Well, the answer to your problem is surprisingly simple.  Your
> motherboard is reporting that the sensors are disabled, thus
> ipmi-sensors doesn't output anything as a result.  One example:
>
> pc-xyz: IPMI Command Data:
> pc-xyz: ------------------
> pc-xyz: [              2Dh] = cmd[ 8b]
> pc-xyz: [               0h] = comp_code[ 8b]
> pc-xyz: [              42h] = sensor_reading[ 8b]
> pc-xyz: [               0h] = reserved1[ 5b]
> pc-xyz: [               0h] = reading_state[ 1b]
> pc-xyz: [               0h] = sensor_scanning[ 1b]
> pc-xyz: [               0h] = all_event_messages[ 1b]
> pc-xyz: [              C0h] = sensor_event_bitmask1[ 8b]
> pc-xyz: IPMI Trailer:
> pc-xyz: --------------
> pc-xyz: [              49h] = checksum2[ 8b]
> Sensor reading/event bitmask not available: sensor scanning disabled
> 2   | Temp             | Temperature              | N/A        | C     |
> N/A
>
> So the question is why is your ipmitool working (or atleast appears to
> be working)?  Because the ipmitool I see from sourceforge checks for
> this bit and will not output if it is detected.
>
>          } else if (!(rsp->data[1]&  SCANNING_DISABLED)) {
>                  validread = 0;
>
> Is it possible your ipmitool is a version supplied by Dell, and Dell has
> hacked it to not check for this to get around this hardware issue?
>
> On the Dell Poweredge node I have access to, via freeipmi I get:
>
> # ipmi-sensors
> ID | Name         | Type        | Reading    | Units | Event
> 1  | Temp         | Temperature | N/A        | C     | N/A
> 2  | Temp         | Temperature | N/A        | C     | N/A
> 3  | Temp         | Temperature | N/A        | C     | N/A
> 4  | Temp         | Temperature | N/A        | C     | N/A
> 5  | Ambient Temp | Temperature | 17.00      | C     | 'OK'
> <snip>
>
> and via ipmitool
>
> # ipmitool -I free sensor list
> Temp             | na         | degrees C  | na    | na        | na        | na 
>        | 85.000    | 90.000    | na
> Temp             | na         | degrees C  | na    | na        | na        | na 
>        | 85.000    | 90.000    | na
> Temp             | na         | degrees C  | na    | na        | na        | na 
>        | na        | na        | na
> Temp             | na         | degrees C  | na    | na        | na        | na 
>        | na        | na        | na
> Ambient Temp     | 17.000     | degrees C  | ok    | na        | 3.000     | 
> 8.000     | 42.000    | 47.000    | na
> <snip>
>
> So the exact same output on my system.  Lets hack them both to NOT check
> for the sensor-scanning disabled bit.
>
> (turning on --entity-sensor-names)
>
> ID | Name                             | Type                     | Reading    | 
> Units | Event
> 1  | Processor 1 Temp                 | Temperature              | -69.00     | 
> C     | 'OK'
> 2  | Processor 2 Temp                 | Temperature              | -65.00     | 
> C     | 'OK'
> 3  | Power Supply 1 Temp              | Temperature              | 40.00      | 
> C     | 'OK'
> 4  | Power Supply 2 Temp              | Temperature              | 40.00      | 
> C     | 'OK'
> 5  | System Board Ambient Temp        | Temperature              | 17.00      | 
> C     | 'OK'
>
> Temp             | -69.000    | degrees C  | ok    | na        | na        | na 
>        | 85.000    | 90.000    | na
> Temp             | -65.000    | degrees C  | ok    | na        | na        | na 
>        | 85.000    | 90.000    | na
> Temp             | 40.000     | degrees C  | ok    | na        | na        | na 
>        | na        | na        | na
> Temp             | 40.000     | degrees C  | ok    | na        | na        | na 
>        | na        | na        | na
> Ambient Temp     | 17.000     | degrees C  | ok    | na        | 3.000     | 
> 8.000     | 42.000    | 47.000    | na
>
> Aha!  It seems that your version of ipmitool has been altered to act
> differently than the normal ipmitool.

yes, you're right
ipmitool was already installed (vers. 1.8.8 ), and I don't know how it 
was installed and/or if it's a special modified version.
Now I have just installed the latest version 1.8.11 and the behaviour is 
changed, ie: only "Ambient temp" is displayed.


> I can easily put in a workaround flag (e.g. -W ignorescanningbit or
> something) to deal with this for Dell motherboards.  However, before
> doing that there is an additional question to be answered.  Are the
> temperatures of -69, -65, 40&  40 correct or incorrect??  At the
> minimum, the temperatures of -69&  -65 seem highly incorrect for
> processor temperatures (but as Andy said earlier, it's possible they are
> margin sensors, but nothing indicates that).

I think Andy is right, please have a look to this page:

http://comments.gmane.org/gmane.linux.hardware.dell.poweredge/25491

and

http://www.intel.com/design/xeon/datashts/313355.htm  section 6.3.1.1


> I am wondering, does Dell supply any software that you might be able to
> try out to see what "Dell approved" readings are?  That way we know what
> should be done.

there's OMSA (OpenManage Server Administrator) available
 at the DELL site, but I didn't try it


So now: is it right to modify the code to don't test disabled sensors,
as you wrote before:

========================================================================
> So the question is why is your ipmitool working (or atleast appears to
> be working)?  Because the ipmitool I see from sourceforge checks for
> this bit and will not output if it is detected.
>
>          } else if (!(rsp->data[1]&  SCANNING_DISABLED)) {
>                  validread = 0;
========================================================================

or not ???
and if yes, will this modification be available in one of next freeipmi 
release or do I have to do in my own  version ?


thank you!

ciao
Franco




> Al
>
>
> On Wed, 2011-08-24 at 01:35 -0700, Franco Brasolin wrote:
> > thank you Albert for your quick response,
> > below all the answers.
> > ciao
> > Franco
> >
> > Il 23/08/2011 19:00, Albert Chu ha scritto:
> > > Hi Franco,
> > >
> > > The fact that you're getting some negative degrees in ipmitool means
> > > something is probably wrong with the IPMI firmware on your mobo.
> > > Something is definitely not right.
> > >
> > > The first thing to try is to run ipmi-sensors w/ --bridge-sensors.  It's
> > > possible the sensors aren't on the main IPMI bus, so they need to be
> > > bridged to other devices on the motherboard.
> >
> > ipmi-sensor -h pc-xyz  -u user -p passw --bridge-sensors doesn't help
> > > As a second shot, this seems similar to a bug I saw on a HP machine.
> > > Could you try running with the "-W discretereading" flag w/
> > > ipmi-sensors.  Maybe that will fix the problem.  It would also be
> > > interesting to compare FreeIPMI's ipmi-sensors output to ipmitool's
> > > 'sensor list' output (ipmitool's assumptions are different in that code
> > > path).
> >
> > ipmi-sensor -h pc-xyz  -u user -p passw --W discretereading
> > doesn't help too
> >
> >
> > In attachment the ipmi-sensor&  ipmitool sensor list output.
> >
> >
> > > If that doesn't help, could you send me the --debug output from
> > > ipmi-sensors.  I'd have to look into detail what is actually going on on
> > > this motherboard.
> >
> > In attachment also the debug output
> > > As a side note, you may be interested in the --entity-sensor-names
> > > option for ipmi-sensors.  It may make your output better for your
> > > motherboard.
> > >
> > > Al
> > >
> > > On Tue, 2011-08-23 at 06:47 -0700, Franco Brasolin wrote:
> > > > Hi all,
> > > > I need some help to read Temperature sensors on a Dell  PowerEdge R410
> > > > model name      : Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz
> > > > # uname -a
> > > > Linux pc-xyz 2.6.18-238.1.1.el5 #1 SMP Wed Jan 19 11:06:36 CET 2011
> > > > x86_64 x86_64 x86_64 GNU/Linux
> > > >
> > > > If I try (from another host with freeipmi 1.06.beta0 installed) the
> > > > following command:
> > > >
> > > > # ipmi-sensors -V
> > > > ipmi-sensors - 1.0.6.beta0
> > > >
> > > > # ipmi-sensors -h pc-xyz  -u user -p passw   | grep -i temp
> > > > 1   | Temp             | Temperature              | N/A        | C     | N/A
> > > > 2   | Temp             | Temperature              | N/A        | C     | N/A
> > > > 3   | Temp             | Temperature              | N/A        | C     | N/A
> > > > 4   | Temp             | Temperature              | N/A        | C     | N/A
> > > > 5   | Ambient Temp     | Temperature              | N/A        | C     | N/A
> > > > 6   | Ambient Temp     | Temperature              | N/A        | C     | N/A
> > > > 7   | Temp             | Temperature              | N/A        | C     | N/A
> > > > 8   | Temp             | Temperature              | N/A        | C     | N/A
> > > > 9   | Temp             | Temperature              | N/A        | C     | N/A
> > > > 10  | Ambient Temp     | Temperature              | 21.00      | C     |
> > > > 'OK'
> > > > 11  | Planar Temp      | Temperature              | N/A        | C     | N/A
> > > > 65  | CPU Temp Interf  | Temperature              | N/A        | N/A   | N/A
> > > > 110 | Mem Overtemp     | Memory                   | N/A        | N/A   | N/A
> > > >
> > > > ie: only ambient temperature is available, while if I use ipmitool:
> > > >
> > > >
> > > > #  ipmitool -H pc-xyz -U user -P passw  sdr type temperature
> > > > Temp             | 01h | ok  |  3.1 | -57 degrees C
> > > > Temp             | 02h | ok  |  3.2 | -63 degrees C
> > > > Temp             | 05h | ok  | 10.1 | 19 degrees C
> > > > Ambient Temp     | 07h | ok  | 10.1 | 24 degrees C
> > > > Temp             | 06h | ok  | 10.2 | 30 degrees C
> > > > Ambient Temp     | 08h | ok  | 10.2 | 27 degrees C
> > > > Ambient Temp     | 0Eh | ok  |  7.1 | 18 degrees C
> > > > Planar Temp      | 0Fh | ok  |  7.1 | 35 degrees C
> > > > IOH THERMTRIP    | 5Dh | ns  |  7.1 | Disabled
> > > > CPU Temp Interf  | 76h | ns  |  7.1 | Disabled
> > > > Temp             | 0Ah | ok  |  8.1 | 26 degrees C
> > > > Temp             | 0Bh | ok  |  8.1 | 23 degrees C
> > > > Temp             | 0Ch | unc |  8.1 | 44 degrees C
> > > >
> > > > I obtain much more info.
> > > > What am I doing wrong ??
> > > >
> > > > thank you very much for your help!
> > > > ciao
> > > > Franco
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > Freeipmi-devel mailing list
> > > > address@hidden
> > > > https://lists.gnu.org/mailman/listinfo/freeipmi-devel