i'm running an Arrandale Acer Travelmate 8172T i3-330UM laptop.
i have been wondering if there's a way to influence fan trippoints on this machine. my regular idling temperatures with no tweaks have been 45/37 for two cores, that's when machine is dead quiet and just how i like it. but as soon as temperature crosses 47C, and that's pretty much with doing anything that changes anything on the screen, audible fan comes immediately on. so far i haven't found a way to do anything about it, haven't had the time either to learn more about modifying DSDT, to see if that's an option here at all. hints welcome btw.
back to topic. enabled all three options (+ pcie_aspm=force) and first apparent effect is that my idle temps rose by about 7C. even with machine sitting totally idle, temps would hover around 53-54C, instead of the earlier 46+.
$ uname -a
Linux travelmate 3.0.2-pf #4 SMP PREEMPT Fri Aug 26 12:39:19 EEST 2011 i686 Intel(R) Core(TM) i3 CPU U 330 @ 1.20GHz GenuineIntel GNU/Linux
there's another parameter - powersave. does that have anything to do with anything here?
$ sudo grep -H '' /sys/module/i915/parameters/*
i have no idea what the acpitz temperatures are. https://bugzilla.kernel.org/show_bug.cgi?id=41612 hints welcome.
Adapter: Virtual device
temp1: +6.8°C (crit = +100.0°C)
temp2: +5.8°C (crit = +119.8°C)
Adapter: ISA adapter
Core 0: +44.0°C (high = +95.0°C, crit = +105.0°C)
Core 2: +50.0°C (high = +95.0°C, crit = +105.0°C)
so far it seems on this laptop these tweaks have an opposite effect on power consumption.