Red Hat Bugzilla – Bug 116850
gkrellm sensors shows 10x high temperature since kernel 2.6.2
Last modified: 2007-11-30 17:10:37 EST
Description of problem:
Since kernel-2.6.2 gkrellm shows all temp. values from sensors ten
times higher as they are (e.g. 370 deg. Celsius instead of 37 deg.).
This is caused by change of kernel's sysfs sensors temp. multiplier,
which was 100 and become 1000. According to Bill Wilson
<email@example.com>, the problem is fixed in gkrellm version 2.1.26.
Version-Release number of selected component (if applicable):
$ rpm -q gkrellm
Steps to Reproduce:
1. Load kernel-2.6.2 or later, load lm_sensors modules for you HW
2. Start gkrellm, enable some temperature sensors in
All temperatures shown in gkrellm are ten times higher.
Values of temperatures shown should be the same as in 'sensors' output.
This is an actual letter from Bill Wilson to gkrellm mailing list that
explains the problem:
Date: Wed, 25 Feb 2004 00:58:12 -0600
From: Bill Wilson <firstname.lastname@example.org>
On Tue, 24 Feb 2004 13:30:44 -0500
"Kurt V. Hindenburg" <email@example.com> wrote:
> A couple of days ago, I upgrade to kernel-2.6.3 and changed from devfs
> to udev. This seems to have messed up my sensors in gkrellm2.
> MB 248.0F
> CPU 599.0F - 725.0F
> I'm not really sure if udev is the problem or perhaps 2.6.3.
This problem actually is with the kernel sysfs temperature factor
value. In a nutshell:
1) Originally the temperature factor was 100.
2) The spec changed to 1000 but not all kernel sensor drivers were
updated to this new factor.
3) Gkrellm was coded to expect the 100 factor and I did not notice
the spec change to 1000 since the kernel driver for my sensor chip
did not get updated to the 1000 value until 2.6.2.
The gkrellm 2.1.26 version I just put up Monday now uses the 1000 factor.
So, either you can upgrade to gkrellm 2.1.26 and all will be fine, or
you can set your temperature factors to 0.1 in your current gkrellm's
If using gkrellm 2.1.26 and a Linux kernel >= 2.6.2, everybody should be
able to have gkrellm temperature config factors of 1.0.
If using gkrellm <= 2.1.25 and Linux kernel >= 2.6.2, some of you
will need to set gkrellm temperature config factors of 0.1.
If using gkrellm 2.1.26 and Linux 2.6.1 or 2.6.0, some will need 10.0
If using gkrellm <= 2.1.25 and Linux 2.6.1 or 2.6.0, some will need
Oh, and the factors are applied to temperatures in centigrade units before
conversion to fahrenheit, so a 0.1 factor applied to the
"CPU 599.0F - 725.0F" above gets "CPU 88.7F - 101.3F"
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new version built in fc2-development.
Thanks for bringing this up !
Verified: using gkrellm-2.1.26-1 temperatures are OK now.