Temperature differences under windows and linux

I have recently set up my Acer Extensa 4420 with dual booting between Windows Vista Home Premium and openSUSE 11.1.

First, I shall mention that openSUSE is the best Linux Distribution I have ever used and would hate to give it up. However, I am concerned about the temperatures that my laptop’s AMD Turion X2 64-bit Dual core processor reaches when running Linux as opposed to Windows. Under windows, measurements taken by CoreTemp and Speedfan indicate that the CPU cores consistently hover around 41-45C while idle. However, when I boot SUSE and examine /proc/acpi/thermal_zone/* or do an acpi -t, I see temps around 55-59C while idle, pushing 70C while web browsing. I know the thermal spec for my CPU says it should crap out around 95C, but I am still worried.

Should I be concerned by these numbers? And if show, can I fix something?

SigmoidFunction wrote:
> I have recently set up my Acer Extensa 4420 with dual booting between
> Windows Vista Home Premium and openSUSE 11.1.
>
> First, I shall mention that openSUSE is the best Linux Distribution I
> have ever used and would hate to give it up. However, I am concerned
> about the temperatures that my laptop’s AMD Turion X2 64-bit Dual core
> processor reaches when running Linux as opposed to Windows. Under
> windows, measurements taken by CoreTemp and Speedfan indicate that the
> CPU cores consistently hover around 41-45C while idle. However, when I
> boot SUSE and examine /proc/acpi/thermal_zone/* or do an acpi -t, I see
> temps around 55-59C while idle, pushing 70C while web browsing. I know
> the thermal spec for my CPU says it should crap out around 95C, but I am
> still worried.
>
> Should I be concerned by these numbers? And if show, can I fix
> something?
>
>

unfortunately many motherboard and cpu makers work very closely with
MS to develop/provide drivers/software that optimizes power usage (and
therefore minimizes heat generation)…

until that situation changes, you will likely continue to see a
difference in running temperature and (therefore) battery life…

as for a ‘danger’ to your cores at 60-70C versus 40-50, forget about it…

however, do keep the cat hair (and other junk) cleaned out of the
cooling paths (check the Acer Extensa 4420 documentation on line for
exactly how to do that) or you risk some data loss when it auto-shuts
down due to overheating, as you sip your latte in the sun, at the
sidewalk cafe/hotspot!


.~.
/V
/( )
natural^^-^^pilot

a diffrence could be that under linux you see the raw info, windows monitor programs often use offsets.

another diffrence can be in what your reading ? is the monitor chip configured to read the cpu diode build in the cpu or is it reading the therminal sensor under the cpu, in other words what you see in the windows program comes from the exact same source/input your seeing under acpi -t ?

and last but not least how is the sensorchip configured when reading it out, has it gotten a reset upon initialising, have some of the register been changed etc. etc.

anyways I would try sensors (probably defaults installed or else search for libsensors3 and 4 in yast) to compare readings between windows and linux and take it from there.

Thank you for your prompt reassurances/suggestions. I had considered that temperature data may be being gleaned from other sources or modified in some way. I will try libsensors, keep my box clean, and stop worrying about temp so much.