[ltp] Re: Lm_sensors & Thinkpads
Keith Frechette
linux-thinkpad@www.bm-soft.com
Tue, 20 Mar 2001 23:12:38 -0500
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Phil,
I have been working on this off-and-on for quite some time, primarily
trying to get our engineering team in Japan to study it and determine
whether we're deviating from an industry standard, or whether lm_sensors
is making inappropriate assumptions about the components attached to the
PIIX4 bus. Here is the only information of consequence that I've received
from them. I was waiting for them to provide better detail; but in absense
of that, I'm releasing what I have.
>>
During configuration phase of install lm_sensor, it asks what I2C
controller chip used.
It detects PIIX4, but actually thermal sensors aren't on the bus of PIIX4.
A flash ROM is on
the PIIX4 bus instead.
Thermal sensors are on the bus of H8. But, I'm not sure, lm_sensor does
not handle
H8 as a I2C bus controller.
If this is true, lm_sensor should have ThinkPad unique control code, I
think.
<<
In response to your note, I've asked the engineering team to contact you
directly. Feel free to continue e-mailing me directly if you don't feel
that progress is being made, or if you need me to be aware of any
particular status.
I'm attempting to escalate this issue internally to get more attention
placed on it. It's been unresolved for far too long.
-- Keith
Keith Frechette
Linux Development Lead, Mobile Computing Options and Software Development
IBM Research Triangle Park, North Carolina
kfrechet@us.ibm.com / 919-543-3761 / TieLine:441-3761
To: Keith Frechette/Raleigh/IBM@IBMUS, sensors@Stimpy.netroedge.com
cc:
Subject: Lm_sensors & Thinkpads
Hello, I'm a developer with Lm_sensors. We occationally are notified
of Thinkpad users installing Lm_sensors on their Thinkpads with
disasterous results. We have yet to get any technical feedback on a
history of events or the hardware involved. Looking through the
linux-thinkpad mailing list, it looked as if you were going to look
into this issue (from the IBM-side of things).
Is there anything we can do to provide assistance? I'd be interested
in the address and chip # of the eeprom in question. Assuming I can
get the datasheet, it would give us a clue as to what sorts of scans
that make the chip write data to it's self.
Thanks!
Phil
--
Philip Edelbrock -- IS Manager -- Edge Design, Corvallis, OR
phil@netroedge.com -- http://www.netroedge.com/~phil
PGP F16: 01 D2 FD 01 B5 46 F4 F0 3A 8B 9D 7E 14 7F FB 7A
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<br><font size=2 face="sans-serif">Phil,</font>
<br>
<br><font size=2 face="sans-serif">I have been working on this off-and-on for quite some time, primarily trying to get our engineering team in Japan to study it and determine whether we're deviating from an industry standard, or whether lm_sensors is making inappropriate assumptions about the components attached to the PIIX4 bus. Here is the only information of consequence that I've received from them. I was waiting for them to provide better detail; but in absense of that, I'm releasing what I have.</font>
<br>
<br><font size=2 face="Courier New">>></font>
<br><font size=2 face="Courier New">During configuration phase of install lm_sensor, it asks what I2C controller chip used.</font>
<br><font size=2 face="Courier New">It detects PIIX4, but actually thermal sensors aren't on the bus of PIIX4. A flash ROM is on</font>
<br><font size=2 face="Courier New">the PIIX4 bus instead.</font>
<br>
<br><font size=2 face="Courier New">Thermal sensors are on the bus of H8. But, I'm not sure, lm_sensor does not handle</font>
<br><font size=2 face="Courier New">H8 as a I2C bus controller.</font>
<br><font size=2 face="Courier New">If this is true, lm_sensor should have ThinkPad unique control code, I think.</font>
<br><font size=2 face="Courier New"><<</font>
<br>
<br><font size=2 face="Courier New">In response to your note, I've asked the engineering team to contact you directly. Feel free to continue e-mailing me directly if you don't feel that progress is being made, or if you need me to be aware of any particular status.</font>
<br>
<br><font size=2 face="Courier New">I'm attempting to escalate this issue internally to get more attention placed on it. It's been unresolved for far too long.</font>
<br>
<br><font size=2 face="Courier New">-- Keith</font><font size=2 face="sans-serif"><br>
<br>
Keith Frechette<br>
Linux Development Lead, Mobile Computing Options and Software Development<br>
IBM Research Triangle Park, North Carolina<br>
kfrechet@us.ibm.com / 919-543-3761 / TieLine:441-3761<br>
</font>
<p><font size=1 color=#800080 face="sans-serif">To: </font><font size=1 face="sans-serif">Keith Frechette/Raleigh/IBM@IBMUS, sensors@Stimpy.netroedge.com</font>
<br><font size=1 color=#800080 face="sans-serif">cc: </font>
<br><font size=1 color=#800080 face="sans-serif">Subject: </font><font size=1 face="sans-serif">Lm_sensors & Thinkpads</font>
<br>
<br>
<br>
<br>
<br><font size=2><tt>Hello, I'm a developer with Lm_sensors. We occationally are notified<br>
of Thinkpad users installing Lm_sensors on their Thinkpads with<br>
disasterous results. We have yet to get any technical feedback on a<br>
history of events or the hardware involved. Looking through the<br>
linux-thinkpad mailing list, it looked as if you were going to look<br>
into this issue (from the IBM-side of things).<br>
</tt></font>
<br><font size=2><tt>Is there anything we can do to provide assistance? I'd be interested<br>
in the address and chip # of the eeprom in question. Assuming I can<br>
get the datasheet, it would give us a clue as to what sorts of scans<br>
that make the chip write data to it's self.<br>
</tt></font>
<br><font size=2><tt>Thanks!<br>
</tt></font>
<br>
<br><font size=2><tt>Phil<br>
</tt></font>
<br><font size=2><tt>--<br>
Philip Edelbrock -- IS Manager -- Edge Design, Corvallis, OR<br>
phil@netroedge.com -- http://www.netroedge.com/~phil<br>
PGP F16: 01 D2 FD 01 B5 46 F4 F0 3A 8B 9D 7E 14 7F FB 7A</tt></font>
<br>
<br>
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