Don't get the power state for all the devices in the boot phase.
---
 drivers/acpi/scan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6/drivers/acpi/scan.c
===================================================================
--- linux-2.6.orig/drivers/acpi/scan.c	2009-05-27 11:08:52.000000000 +0800
+++ linux-2.6/drivers/acpi/scan.c	2009-05-27 11:09:53.000000000 +0800
@@ -865,7 +865,7 @@
 	/* TBD: System wake support and resource requirements. */
 
 	device->power.state = ACPI_STATE_UNKNOWN;
-	acpi_bus_get_power(device->handle, &(device->power.state));
+	//acpi_bus_get_power(device->handle, &(device->power.state));
 
 	return 0;
 }