Public bug reported:
Binary package hint: acpi-support
System: HP Compaq nc6400, T7200 @ 2-GHZ
$ uname -a
Linux mblakele-lt 2.6.22-8-generic #1 SMP Thu Jul 12 16:09:47 GMT 2007 x86_64
GNU/Linux
$ apt-show-versions | grep acpi
acpi/gutsy uptodate 0.09-3ubuntu1
acpidump/gutsy uptodate 20061130-1
acpi-support/gutsy uptodate 0.98
acpid/gutsy uptodate 1.0.4-5ubuntu8
Unexpected behavior: since yesterday's acpi update, my fans are always
on high, but the system feels quite cool. It seems like the thermal-zone
info is wrong, or is being misinterpreted:
$ acpi -t
Battery 1: charged, 100%
Battery 2: discharging, 46%, 01:44:09 remaining
Thermal 1: ok, 28.0 degrees C
Thermal 2: ok, 35.0 degrees C
Thermal 3: ok, 36.0 degrees C
Thermal 4: ok, 30.0 degrees C
Thermal 5: ok, 25.0 degrees C
Thermal 6: ok, 88.0 degrees C
$ cat /proc/acpi/thermal_zone/TZ0/trip_points
critical (S5): 256 C
active[0]: 90 C: devices=C335
active[1]: 80 C: devices=C336
active[2]: 73 C: devices=C337
active[3]: 65 C: devices=C338
active[4]: 55 C: devices=C339
I don't believe anything on this system is 88-C at the moment. Bug
126447 might be related - that reporter suggests that fan state is being
misinterpreted as temperature, resulting in a vicious cycle (or at least
a noisy one).
Note that the behavior is the same with the 2.6.22-10 kernel: I'm still
using -8 because I can't suspend-resume successfully with -10.
** Affects: acpi-support (Ubuntu)
Importance: Undecided
Status: New
--
fans always on, unlikely temperature in acpi thermal_zone #5
https://bugs.launchpad.net/bugs/136595
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