2.6.24: (ACPI AC adapter) sending {proc,netlink,kobject}_event from -> resume method?

2.6.24: (ACPI AC adapter) sending {proc,netlink,kobject}_event from -> resume method?

[Andrey Borzenkov]

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Is it valid to send events from within ->resume device method? If not, what is 
the proper way to notify user space about hardware changes during suspension? 
Specifically it seems that new sysfs ACPI power supply interface sometimes 
missing plugged in AC cord during suspend. I suspect that no event is 
generated for this; I am not sure whether ACPI is required to generate such 
events at all in this case.

I'll need some time to get reproducible case so I do not categorize this yet 
as regression.

-andrey

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Re: 2.6.24: (ACPI AC adapter) sending {proc,netlink,kobject}_event from -> resume method?

[Rafael J. Wysocki]

On Tuesday, 30 October 2007 20:33, Andrey Borzenkov wrote:
> Is it valid to send events from within ->resume device method?

It is or at least it should be.  The GPEs are supposed to be fully functional
at this point.

> If not, what is the proper way to notify user space about hardware changes
> during suspension?  
> Specifically it seems that new sysfs ACPI power supply interface sometimes 
> missing plugged in AC cord during suspend. I suspect that no event is 
> generated for this; I am not sure whether ACPI is required to generate such 
> events at all in this case.
> 
> I'll need some time to get reproducible case so I do not categorize this yet 
> as regression.

Is the "[2.6.24-rc1 regression] AC adapter state does not change after resume"
message a follow-up to this one?

Rafael

Re: 2.6.24: (ACPI AC adapter) sending {proc,netlink,kobject}_event from -> resume method?

[Andrey Borzenkov]

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On Wednesday 31 October 2007, Rafael J. Wysocki wrote:
> On Tuesday, 30 October 2007 20:33, Andrey Borzenkov wrote:
> > Is it valid to send events from within ->resume device method?
>
> It is or at least it should be.  The GPEs are supposed to be fully
> functional at this point.
>
> > If not, what is the proper way to notify user space about hardware
> > changes during suspension?
> > Specifically it seems that new sysfs ACPI power supply interface
> > sometimes missing plugged in AC cord during suspend. I suspect that no
> > event is generated for this; I am not sure whether ACPI is required to
> > generate such events at all in this case.
> >
> > I'll need some time to get reproducible case so I do not categorize this
> > yet as regression.
>
> Is the "[2.6.24-rc1 regression] AC adapter state does not change after
> resume" message a follow-up to this one?
>

yes

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