Re: Kernel module 'thermal'

On Monday 09 April 2007, Mark Haney wrote:
Anne Wilson wrote:
On Monday 09 April 2007, Andy Green wrote:
Anne Wilson wrote:
I've not had much luck with lm-sensors on this box, so when LXF ran an
article on it this month I decided to try again. The first thing it
talks about is the kernel module 'thermal'.

# lsmod | grep thermal
#
# modprobe thermal
FATAL: Module thermal not found.

It goes on to say that you can type 'acpi -t' to get the same output:

acpi -t
-bash: acpi: command not found

Perhaps this is why lm-sensors can't get any info?

Any hints?

It's built into the Fedora kernel

CONFIG_ACPI_THERMAL=y

Try, eg,

cat /proc/acpi/thermal_zone/*/temperature

Where the * is defined by your BIOS, eg, THR1.

/proc/acpi/thermal_zone/ is empty!

Anne

Sounds to me like ACPI is either not in the kernel or you've added
noacpi acpi=off to the kernel boot parameters.

No, I haven't messed with boot parameters at all on this box, but now I
remember that there is a boot message

"powernow-k8: BIOS error - no PSB or ACPI "

So I guess that's it. Just a useless bios.

Google turned up this useful link, though.
http://gentoo-wiki.com/HOWTO_PowerNow!

To check if your currently running kernel supports PowerNow!, do dmesg | grep
powernow

dmesg | grep powernow
powernow-k8: Found 1 AMD Hammer Family processor - Model Unknown processors
(version 2.00.00)
powernow-k8: BIOS error - no PSB or ACPI _PSS objects

If you get an error like this:
powernow-k8: BIOS error - no PSB or ACPI _PSS objects
Then probably you don't have the Cool'n'Quiet enabled in the BIOS. People have
also reported that they get the same error even if the option is set
correctly. You should ensure your BIOS has support for the feature, since the
linux driver needs frequency tables (PSB) or ACPI methods (_PSS) to work.
Then try if upgrading your BIOS solves the issue. If you have this error,
make sure that you have ACPI Processor support enabled in your kernel, the
non-ACPI ways is disabled on SMP bioses (including those that support X2
processors) and deprecated by AMD.

It's not worth updating the bios, I think. I'll be upgrading the whole box in
a few weeks. Funny, or not so funny, in that I left Asus boards after
several years of using them, because I couldn't get lm-sensors to work with
the last Asus board I bought. I thought Abit would be reliable.

Anne

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