I've got a 6735s. Under normal use the fan is mostly on it's lowest
speed, switching off sometimes below 45 C. When that happens, the lowest
active trip point gets set to 50 C and it usually takes a bit of time
before the fan comes back on - all fine so far.
After resuming from suspend I have fixed trip points so the fan can be
switching off and on. To prevent this I set the lowest active trip point
down to 40 C (My temp doesn't drop below 43 C). This can be done as an
option when inserting the "thermal" module.
After suspend, I find it less irritating to have the fan on it's lowest
setting than have it hunting around 45 C, turning off and on
#!/bin/bash
# Kick the fans
modprobe -r fan
modprobe -r thermal
modprobe fan
modprobe thermal act=40
/etc/rc.d/acpid restart
for x in /proc/acpi/fan/*; do
if [ "`grep on $x/state`" ]; then
echo -n 3 > $x/state;
sleep 1
echo -n 0 > $x/state;
fi
if [ "`grep off $x/state`" ]; then
echo -n 0 > $x/state;
sleep 1
echo -n 3 > $x/state;
fi
done
echo -n 5 > /proc/acpi/thermal_zone/CPUZ/polling_frequency
--
Laptop Fan always on after resume from suspend to RAM
https://bugs.launchpad.net/bugs/77370
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