suspend/resume improved?

[Nate Lawson]

Ulrich Spoerlein wrote:
> On Wed, 08.12.2004 at 12:58:26 -0800, Nate Lawson wrote:
> 
>>Add an infinite loop at various points in the suspend process until it 
>>hangs but doesn't reset.  Start with the end of the first function below 
>>and work your way backwards.  Once you identify the exact place the 
>>reset occurs, we can figure out why.  Use boot -s to keep from having to 
>>fsck on each reset or hang.
>>
>>AcpiEnterSleepState():sys/contrib/dev/acpica/hwsleep.c
> 
> 
> Line 444 is the culprit:
>     ACPI_FLUSH_CPU_CACHE ();
> 
>     Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1AControl);
>     if (ACPI_FAILURE (Status))
>     {
>         return_ACPI_STATUS (Status);
>     }
> 
> Putting the loop before AcpiHwRegisterWrite will enter infinite loop,
> putting it after it -> Reset

Interesting.  If you add a "DELAY(10000);" before the register write, 
does this help?  A more likely issue is that we need to write pm1a/b at 
the same time.  Let me think about this and get you more info later.

-- 
Nate