Re: port-i386/44581: MacBook1,1 won't resume after suspend

[Jukka Ruohonen <jruohonen%iki.fi@localhost>]

On Wed, Feb 16, 2011 at 06:00:09PM +0000, Taylor R Campbell wrote:
>  This is kind of shot in the dark, but can you try the following small
>  patch?
>  
>  No dice -- same interrupt storm.

Another one attached.

This is based on the following Linux bug report that sounds awfully similar:

        https://bugzilla.kernel.org/show_bug.cgi?id=6670

Len Brown from Intel concludes therein that this would be a BIOS bug.

Index: acpi_wakeup.c
===================================================================
RCS file: /cvsroot/src/sys/arch/x86/acpi/acpi_wakeup.c,v
retrieving revision 1.27
diff -u -p -r1.27 acpi_wakeup.c
--- acpi_wakeup.c       13 Jan 2011 03:45:38 -0000      1.27
+++ acpi_wakeup.c       16 Feb 2011 18:23:00 -0000
@@ -342,6 +342,11 @@ acpi_md_sleep(int state)
        inittodr(time_second);
 
        /*
+        * A workaround for broken BIOS.
+        */
+       (void)AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, 1);
+
+       /*
         * Clear fixed events (see e.g. ACPI 3.0, p. 62).
         * Also prevent GPEs from misfiring by disabling
         * all GPEs before interrupts are enabled. The