Bug#697548: linux-image-3.7-trunk-amd64: temperatures are too high on Lenevo T420
Le Sun, 06 Jan 2013 20:30:09 +0000
Ben Hutchings <ben@decadent.org.uk> a écrit:
> Control: tag -1 moreinfo
>
> On Sun, 2013-01-06 at 21:04 +0100, gpe wrote:
> > Package: src:linux
> > Version: 3.7.1-1~experimental.2
> > Severity: normal
> >
> > Dear Maintainer,
> >
> > * What led up to the situation?
> >
> > updating with kernel 3.7.1. My machine is a Lenovo T420 (model
> > 4180AT9)
> >
> > * What exactly did you do (or not do) that was effective (or
> > ineffective)?
> >
> > starting the system and logging into gnome session
> >
> > * What was the outcome of this action?
> >
> > sensors reports temperatures for cores and thermal zone which are
> > between 52°C and 60°C
>
> This is not really very hot.
In absolute not but for an idle state ...
>
> > * What outcome did you expect instead?
> >
> > when running with kernel 3.6.9 the temperatures are under 42°C
> [...]
>
> Did you test this immediately after rebooting? I would expect an
> upgrade and reboot to make the CPU heat up. You would have to leave it
> idle for some minutes to make a proper comparison.
Yes it's that I've done. I've switched several between 3.6.9 and 3.7.1 and
each the temperatures are significantly higher with 3.7.1.
>
> If the temperature really stays higher with the newer kernel version
> then please install linux-tools-3.7 and generate a performance report:
>
> # running as root:
> perf record -g -a sleep 60
> perf report -g > perf.txt
Could you confirm the last command please ?
Regards.
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