Re: kern/43508: fan are shut down in any case if running on battery

[Jukka Ruohonen <jruohonen%iki.fi@localhost>]

On Wed, Jun 30, 2010 at 10:18:10AM +0400, Aleksej Saushev wrote:
> > When running on AC line, everything works perfectly if I excess a
> > certain temperature fans will raise up. But running on battery I
> > noticed that the fan is completely shut down!
> >
> > Then I excess 100C? and no fan turns! It's really dangerous because it
> > overheats really soon and after 5-10 minutes the laptop is shut down.
> 
> I'm affected by this problem.
> 
> Try reverting to current as of 2010-06-07, it helps me. This problem is
> recent, it changed some time between 2010-05-15 and 2010-06-18.

To diagnose this:

        (a) post the acpidump(8) output;

        (b) compile a kernel with ACPI_DEBUG;

        (c) set 'sysctl -w hw.acpi.debug.level=ACPI_LV_ALL_EXCEPTIONS' and
                'sysctl -w hw.acpi.debug.layer=ACPI_ALL_DRIVERS'

        (d) post possible debug output shown in the dmesg.