Re: [Bugme-new] [Bug 13243] New: regression from 2.6.29 : can't suspend on a compaq nc6000, suspend_device(): pnp_bus_suspend+0x0/0x6b returns -5

[Witold Szczeponik <Witold.Szczeponik@gmx.net>]

yakui_zhao schrieb:

> What you said is right. After applying that commit, the C169 device will
> be switched to D3. And when the C169 device is switched to D3, the power
> resource(C16D) will be turned off.
>    But unfortunately the _OFF object of C16D is bogus. In such case the
> _STA method can't reflect the correct status of power resource and OS
> will complain that the C169 device can't be switched to D3 state.
>    > Method (_OFF, 0, NotSerialized)
>    >                         {
>                                 Store (0x00, Local0)
>    >                         }

I think this is the key to understanding what is going on here: it seems 
as if the BIOS does not allow for disabling the power resource through 
ACPI.  I suspect the Linux' ACPI core tries to set the power resource to 
D3, then evaluates _STA, and relizes that something went wrong.  But I 
am guessing here...  Even more speculation: Windows either does not care 
or makes the transition from D0 to D3 only once...

--- Witold

> 	
>    
>    If we add the boot option of "acpi.power_nocheck=1", the status check
> will be skipped in course of D0/D3 state transition.
>