lm-sensors

Bug #370173
Comment #129

Comment 129 for bug 370173

Revision history for this message

Andy Whitcroft (apw) wrote on 2009-06-18: Re: Ubuntu 9.04 laptop overheat and shutdown

#129

LP#370173

It seems there is a mix of issues here. For this bug we shall consider the issue that the latest Jaunty kernel is perceived to fail to manage the CPU temperature correctly and that it used to work correctly on Intrepid. If you have a different issue please file a separate bug.

To confirm this issue that we need to compare at least these two releases in a controlled manner. This will better allow us to confirm that this is a regression. To better identify the location of this regression and any potential fix it would be helpful to test the kernels below. For those of you comfortable installing kernels and also able to get their temperature information (either via sensors or another method), it would be helpful to get comparisons of a number of kernels (please pick one of the i386 or amd64 kernels to match your system). If you have another version where you know the bug does not exhibit, it would be helpful to include the same test results for that kernel too:

Intrepid Latest -- 2.6.27-14.34
    http://launchpadlibrarian.net/27522947/linux-image-2.6.27-14-generic_2.6.27-14.34_i386.deb
    http://launchpadlibrarian.net/27522807/linux-image-2.6.27-14-generic_2.6.27-14.34_amd64.deb
Jaunty Latest -- 2.6.28-13.44
    http://launchpadlibrarian.net/27405830/linux-image-2.6.28-13-generic_2.6.28-13.44_i386.deb
    http://launchpadlibrarian.net/27405998/linux-image-2.6.28-13-generic_2.6.28-13.44_amd64.deb
Mainline 2.6.28.x
    http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.28.10/linux-image-2.6.28-02062810-generic_2.6.28-02062810_i386.deb
    http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.28.10/linux-image-2.6.28-02062810-generic_2.6.28-02062810_amd64.deb
Mainline 2.6.30
    http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.30/linux-image-2.6.30-020630-generic_2.6.30-020630_i386.deb
    http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.30/linux-image-2.6.30-020630-generic_2.6.30-020630_amd64.deb

for each test using stress (sudo apt-get install stress):

stress --cpu 16 --vm 2 --vm-bytes 128M

Run this for a measured period of time say 15 minutes and then gather the temperatures, I use sensors for this:

    $ sensors
    acpitz-virtual-0
    Adapter: Virtual device
    temp1: +46.0°C (crit = +100.0°C)
    temp2: +43.0°C (crit = +100.0°C)
    temp3: +0.0°C (crit = +100.0°C)

If you are able to identify your your fan speeds it would also be helpful to include that information in your report. In all cases please report your results in this bug. Thanks.

LP#370173

It seems there is a mix of issues here.  For this bug we shall consider the issue that the latest Jaunty kernel is perceived to fail to manage the CPU temperature correctly and that it used to work correctly on Intrepid.  If you have a different issue please file a separate bug.

To confirm this issue that we need to compare at least these two releases in a controlled manner.  This will better allow us to confirm that this is a regression.  To better identify the location of this regression and any potential fix it would be helpful to test the kernels below.  For those of you comfortable installing kernels and also able to get their temperature information (either via sensors or another method), it would be helpful to get comparisons of a number of kernels (please pick one of the i386 or amd64 kernels to match your system).  If you have another version where you know the bug does not exhibit, it would be helpful to include the same test results for that kernel too:

for each test using stress (sudo apt-get install stress):

stress --cpu 16 --vm 2 --vm-bytes 128M

Run this for a measured period of time say 15 minutes and then gather the temperatures, I use sensors for this:

$ sensors
    acpitz-virtual-0
    Adapter: Virtual device
    temp1:       +46.0°C  (crit = +100.0°C)                  
    temp2:       +43.0°C  (crit = +100.0°C)                  
    temp3:        +0.0°C  (crit = +100.0°C)

If you are able to identify your your fan speeds it would also be helpful to include that information in your report.  In all cases please report your results in this bug.  Thanks.