Re: Problems with gpe13 interrupt storm.

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On Saturday, January 26, 2013 09:46:24 AM James Courtier-Dutton wrote:
> Some more detailed context can be found here:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/887793
> 
>     Scope (_GPE)
>     {
>         Method (_L13, 0, NotSerialized)
>         {
>             If (LEqual (PFLV, FDTP))
>             {
>                 Return (Zero)
>             }
> 
>             Store (Zero, GPE3)
>             Or (GL08, 0x10, GL08)
>             Notify (\_SB.PCI0.SAT0, 0x82)
>             Return (Zero)
>         }
>     }
> 
> This is the DSDT code for GPE13 on a Samsung Series 7 700Z5C laptop.
> There error reported by the Linux kernel is:
>  ev_queue_notify_reques: No notify handler for Notify, ignoring (SAT0, 82)
> 
> Now, my question is:
> How do I find out what device is causing the GPE13 interrupt and why?

You can look into the ACPI tables, for example.

Please file a but at bugzilla.kernel.org against ACPI and assign it to me.
Please put the output of acpidump on your system as an attachment to the bug
entry.

> How do I work out what code (which device register bit to reset) I have to
> put in this Notify handler in order to silence the interrupt storm?

You need to find out what the cause of the Notify is first.

Thanks,
Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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