Mailinglist Archive: opensuse-bugs (8107 mails)

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[Bug 134354] FSC Amilo M3438G makes use of Windows ACPI Specs - Fans always on
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Sat, 10 Feb 2007 11:20:21 -0700 (MST)
  • Message-id: <20070210182021.F3801FC1@xxxxxxxxxxxxxxxxxxxxxx>
https://bugzilla.novell.com/show_bug.cgi?id=134354


trenn@xxxxxxxxxx changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |daniel.rahn@xxxxxxxxxx
Severity|Major |Normal
Status|ASSIGNED |RESOLVED
Resolution| |WONTFIX




------- Comment #24 from trenn@xxxxxxxxxx 2007-02-10 11:20 MST -------
Daniel, do we also have contact to FSC laptop team?
This is probably a BIOS issue.
I could imagine one can find a workaround by modifing BIOS DSDT tables and let
them override in RAM by the kernel at boot time. But this is not a solution for
common customers (if this is possible at all, it's not easy, see below)...
IMO it's only worth investigating here further if FSC offers to pick up fixes
(at least in further laptops) for their BIOSes.
I had another look at the DSDT, it looks like there is no fan control inside
ACPI. There is only a "Silent Mode" whether it's on or off seems to be passed
to outside Windows Applications (linux does not have any tool and probably
never will that makes use of that) via WMI ACPI spec (see link in comment #13).
If FSC wants to have functioning fans on linux they should stick to the
official ACPI specs and control the fan directly via BIOS or an ordinary ACPI
fan device (as all, or most other laptop vendors do).

It looks like a lot people suffer from that, there is another bug here:
http://bugzilla.kernel.org/show_bug.cgi?id=5670

So for now there is nothing we can do about this and I will close this one. It
would be great if FSC guys could have a look at this one to at least recognise
what happens if you stick to M$ only specs and try to go for official ACPI spec
in future BIOSes.

You still may want to try newer BIOSes (or search the BIOS config)... Maybe FSC
also offers Embedded Controller (EC) firmware updates like Lenovo? It's worth a
try, but I doubt it would help...


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