linux-kernel - Re: Odd suspend regression in 2.6.21-rc[123]

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Date:	Sat, 10 Mar 2007 01:18:54 -0500
From:	Ray Lee <ray-lk@...rabbit.org>
To:	Adrian Bunk <bunk@...sta.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Alexey Starikovskiy <alexey.y.starikovskiy@...ux.intel.com>,
	Vladimir Lebedev <vladimir.p.lebedev@...el.com>,
	Len Brown <len.brown@...el.com>
Subject: Re: Odd suspend regression in 2.6.21-rc[123]

Ray Lee wrote:
> In 2.6.21-rc1,2,3, my laptop will fully suspend to ram, but then
> *immediately* resumes back from suspension. (It resumes just fine, as well.)
[...]
> HP/Compaq NX6125 system, AMD64, dmesg attached.

hg bisect found the below patch as the culprit, and reverting it does
fix the regression. It's supposed to address "sometime ac/battery update
stops after resume from disk." This thread:
http://lkml.org/lkml/2007/2/24/111 appears to talk about the same issue,
and therefore it may be solved without the below patch, so perhaps we
can all be happy.

Regardless, I think my laptop no longer being able to go into S3 sleep
is a bit more important than someone else's laptop merely not showing
the correct AC status :-).

Please revert. (git patch id ed41dab90eb40ac4911e60406bc653661f0e4ce1)

Ray


ACPI: Disable GPEs in preparation for sleep.

http://bugzilla.kernel.org/show_bug.cgi?id=7887

Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@...ux.intel.com>
Signed-off-by: Vladimir Lebedev <vladimir.p.lebedev@...el.com>
Signed-off-by: Len Brown <len.brown@...el.com>

committer: Len Brown <len.brown@...el.com>


diff -r 31db4f8c1b77 -r 2a00d393c882 drivers/acpi/hardware/hwsleep.c
--- a/drivers/acpi/hardware/hwsleep.c   Fri Feb 09 10:45:33 2007 -0800
+++ b/drivers/acpi/hardware/hwsleep.c   Sat Feb 10 01:30:35 2007 -0500
@@ -235,6 +235,14 @@ acpi_status acpi_enter_sleep_state_prep(
                                "While executing method _SST"));
        }

+       /*
+        * 1) Disable/Clear all GPEs
+        */
+       status = acpi_hw_disable_all_gpes();
+       if (ACPI_FAILURE(status)) {
+               return_ACPI_STATUS(status);
+       }
+
        return_ACPI_STATUS(AE_OK);
 }

@@ -290,13 +298,8 @@ acpi_status asmlinkage acpi_enter_sleep_
        }

        /*
-        * 1) Disable/Clear all GPEs
         * 2) Enable all wakeup GPEs
         */
-       status = acpi_hw_disable_all_gpes();
-       if (ACPI_FAILURE(status)) {
-               return_ACPI_STATUS(status);
-       }
        acpi_gbl_system_awake_and_running = FALSE;

        status = acpi_hw_enable_all_wakeup_gpes();

-
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