[Bugme-new] [Bug 9167] New: ACPI (thermal) problems with Acer Aspire 5720

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=9167

           Summary: ACPI (thermal) problems with Acer Aspire 5720
           Product: ACPI
           Version: 2.5
     KernelVersion: 2.6.22 and 2.6.23
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: ACPICA-Core
        AssignedTo: acpi_acpica-core at kernel-bugs.osdl.org
        ReportedBy: marco.calviani at gmail.com
                CC: marco.calviani at gmail.com


Distribution: 
Gentoo Linux x86_64 version

Hardware Environment:
ACER Aspire 5720, x86_64 environment

Problem Description:
I have thermal issues with my Acer Aspire 5720 (Santa Rosa, T7300 Intel Core 2
Duo).
In particular:
# cat /proc/acpi/thermal_zone/TZ01/trip_points
critical (S5):           100 C
so that there is no rules for activating the fans.
Additionally /proc/acpi/thermal_zone/TZ01/temperature does not get updated
neither
if i change the polling_freqency, so that even if the core temperature
reaches 70-80C the fans never starts.
The only way to control the core temperature is via the coretemp kernel module,
but since in the ACER laptops the fan is masked from the user, nothing can be
done (at user level).

My original DSDT table is here:
http://aceracpi.googlecode.com/svn/trunk/dsdt/acer/aspire/5720.dsl
(but you can find it also here http://acpi.sourceforge.net/dsdt/view.php)
The original, as dumped from /proc/acpi/dsdt, does not compile, but i've manage
to wipe
out the errors and warning.  Also in this case, however, the ACPI behaviour is
still the same.

All the ACPI modules are built in the monolithic kernel.

I've tried different configurations:
kernel 2.6.22-gentoo-r8
kernel 2.6.22.10
kernel 2.6.23-rc8-mm2
but the results are always the same.


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