Re: shutdown after kernel upgrade

["Marcio H. Parreiras" <mhp.eti@gmail.com>]

Dear John, you was right.
After investigating I found that the ACPI subsystem isn't measuring CPU temperature. The command 'cat /proc/acpi/thermal_zone/TZ01/temperature' returns zero celsius degrees when the new kernel is loaded, so the fan never runs. This is why the symptom doesn't happen on the old desktop machine, which don't have fan control. By while, I removed the new kernel and I'm using the old kernel, which reads the real temperature and controls the fan correctly, and I will wait for a new kernel update to see if the bug was fixed. 

Regards,

2010/1/28 John <JohnRChamplin@columbus.rr.com>

On 28/01/10, ?????????????? ???????????? (gpall@ccf.auth.gr) wrote:

| > Same here with both Debian and vanilla versions of all 2.6.32 kernels,
| > home-compiled, running sid on an old IBM Thinkpad A31, with cpufreqd
| > and cpufrequtils. On my machine, the shutdown is caused by runaway
| > overheating after only a few minutes, so there's not much time for
| > diagnosing.  2.6.31.6 with same basic .config runs fine.
| >
| >
|
| how did you understand it was due to heating??

cat /proc/acpi/ibm/fan && cat /proc/acpi/ibm/thermal

--
JohnRChamplin@columbus.rr.com
====================================================
GPG key 1024D/99421A63 2005-01-05
EE51 79E9 F244 D734 A012 1CEC 7813 9FE9 9942 1A63
gpg --keyserver subkeys.pgp.net --recv-keys 99421A63

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)

iEYEARECAAYFAkth19UACgkQeBOf6ZlCGmNAaACdGAlVdb7s4U/QOXIfSpl2vKjo
YPgAoJKAAaHiFVOecxywPmEqn1r735Vt
=ZAeK
-----END PGP SIGNATURE-----

-- 
Marcio H. Parreiras

GNU/Linux Professional

Tel.: (31)9632-0320

Pedro Leopoldo - MG - Brasil


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