http://bugzilla.kernel.org/show_bug.cgi?id=9754


[EMAIL PROTECTED] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO




------- Comment #6 from [EMAIL PROTECTED]  2008-01-15 16:48 -------
ACPI does not control the fans on the Acer 5315.
 There are no active cooling trip points under
 the _TZ/_TZ01 -- the only ACPI thermal zone on the system.
 And there are no PNP0C0B fan devices.

Re: the temperature reported by the ACPI thermal zone:

            Method (_TMP, 0, Serialized)
            {
                If (ECON)
                {
                    If (DTSE)
                    {
                        Store (DTS2, Local1)
                        If (LGreaterEqual (DTS1, DTS2))
                        {
                            Store (DTS1, Local1)
                        }

                        Store (Local1, \_SB.PCI0.LPC.EC0.SKTA)
                        Return (Add (0x0AAC, Multiply (Local1, 0x0A)))
                    }
                }

                Return (0x0BB8)
            }

if (!ECON) you would get a constant reading:
0xBB8 = 3000 -> 300.0K -> 27C
Hmmm, but you're seeing 55C after resume -- is that always
true no matter what temperature was upon suspend?

also, if !ECON, a lot of things in the DSDT would go away....
eg. does /proc/acpi/battery/*/* still make sense after resume?

Perhaps you are open to some debugging with a modified DSDT?
http://www.lesswatts.org/projects/acpi/overridingDSDT.php
Might be non-trivial, because past experience suggests
that nobody at Acer has ever run their ASL through
http://linuxfirmwarekit.org/ etc.

but first, perhaps you can poke some easy to turn knobs.
any difference booting with
acpi_osi=
or
acpi_osi="!Windows 2006"
(this may effect other things, such as HPET, or video display events)

BTW, here is yet another platform-specific item in this system
that Linux doesn't know about:

            Device (MIR)
            {
                Name (_HID, EisaId ("ENE0100"))

I have no idea what it is, but in Windows you'll see this device
on IRQ 4.


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