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To: andrew.grover@intel.com
Cc: acpi-jp@jp.freebsd.org
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Message-Id: <20010724033811M.iwasaki@jp.FreeBSD.org>
Date: Tue, 24 Jul 2001 03:38:11 +0900
From: Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
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Subject: [acpi-jp 1186] ACPICA 20010717: S1 causes power-off
Errors-To: owner-acpi-jp@jp.freebsd.org
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X-Originator: iwasaki@jp.freebsd.org

Hi, Andrew.

I've noticed that 20010717 version of hwsleep.c:AcpiEnterSleepState()
has 2-phase operation for sleep state transition and this cause a problem
which S1 transition makes the system powered off.  I can see this on
ASUS P2B based desktop system, not on any laptop machines around here.
Could you review following workaround for this problem?

Thanks

Index: hwsleep.c
===================================================================
RCS file: /home/ncvs/src/sys/contrib/dev/acpica/hwsleep.c,v
retrieving revision 1.1.1.5
diff -u -r1.1.1.5 hwsleep.c
--- hwsleep.c	2001/07/21 03:55:15	1.1.1.5
+++ hwsleep.c	2001/07/23 17:55:40
@@ -298,8 +298,11 @@
     /* wait a second, then try again */
     AcpiOsStall(1000000);
 
-    AcpiHwRegisterWrite(ACPI_MTX_LOCK, PM1_CONTROL,
-        (1 << AcpiHwGetBitShift (SLP_EN_MASK)));
+    if (SleepState > ACPI_STATE_S1)
+    {
+        AcpiHwRegisterWrite(ACPI_MTX_LOCK, PM1_CONTROL,
+            (1 << AcpiHwGetBitShift (SLP_EN_MASK)));
+    }
 
     enable();
 

