Public bug reported:
I have a ThinkPad T61
After upgrading from 8.04 to 8.10 the fan constantly works at low speed.
/proc/acpi/ibm/fan shows enabled and even reports fan speeds (up to
3500), yet I can't detect any changes in speed (and i also think speeds
should go higher).
Echoing levels to /proc/acpi/ibm/fan changes the values of speed, but
there's no physical change.
I tried tpfand, fancontrol, the 'watchdog' command. i disabled all
before trying the above.
The result is that when the laptop has intensive CPU work, its
temperature raises (normally it is ~50c)
** Affects: ubuntu
Importance: Undecided
Status: New
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fan speed constantly low
https://bugs.launchpad.net/bugs/297048
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