https://bugzilla.kernel.org/show_bug.cgi?id=12389
ykzhao <yakui.z...@intel.com> changed:
What |Removed |Added
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CC| |yakui.z...@intel.com
--- Comment #20 from ykzhao <yakui.z...@intel.com> 2010-12-28 05:47:42 ---
hi, James
Do you mean that the bios limit will be changed when the AC adaptor is
plugged/unplugged? From the ACPI AML code it seems that it will update the _PPC
and send the notification event when AC is plugged/unplugged.
>Method (_Q16, 0, NotSerialized)
{
Store (0x16, P80H)
If (LEqual (ADP, Zero))
{
Store (\_PR.CPU0.VPPC, \_PR.CPU0._PPC)
Store (\_PR.CPU0.VPPC, \_PR.CPU1._PPC)
TRAP (0x42)
}
Else
{
If (LEqual (SILM, One))
{
Store (\_PR.CPU0.VPPC, \_PR.CPU0._PPC)
Store (\_PR.CPU0.VPPC, \_PR.CPU1._PPC)
TRAP (0x42)
}
Else
{
Store (Zero, \_PR.CPU0._PPC)
Store (Zero, \_PR.CPU1._PPC)
TRAP (0x43)
}
}
At the same time it will also update the _PPC value in course of querying
the AC status by using _PSR object.
Method (_PSR, 0, NotSerialized)
{
If (LEqual (^^PCI0.LPCB.EC.ADP, Zero))
{
If (THRF) {}
Else
{
Store (\_PR.CPU0.VPPC, \_PR.CPU0._PPC)
Store (\_PR.CPU0.VPPC, \_PR.CPU1._PPC)
Notify (\_PR.CPU0, 0x80)
Sleep (0x64)
Notify (\_PR.CPU0, 0x81)
Sleep (0x0A)
Notify (\_PR.CPU1, 0x80)
Sleep (0x64)
Notify (\_PR.CPU1, 0x81)
TRAP (0x42)
}
}
Will you please poll the AC status again and then check whether the speed
limit is correct?
>for example: /proc/acpi/ac_adapter/*/state
Thanks.
Yakui
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