The patch titled
beeping patch for debugging acpi sleep
has been added to the -mm tree. Its filename is
beeping-patch-for-debugging-acpi-sleep.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: beeping patch for debugging acpi sleep
From: Pavel Machek <pavel@xxxxxx>
Starting beeper as soon as ACPI sleep returns is very useful in debugging
"apparently dead" machines. If it beeps at all, it makes sense to start
playing with CMOS tracer.
Signed-off-by: Pavel Machek <pavel@xxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/i386/kernel/acpi/wakeup.S | 20 +++++++++++++++++++-
1 files changed, 19 insertions(+), 1 deletion(-)
diff -puN arch/i386/kernel/acpi/wakeup.S~beeping-patch-for-debugging-acpi-sleep arch/i386/kernel/acpi/wakeup.S
--- a/arch/i386/kernel/acpi/wakeup.S~beeping-patch-for-debugging-acpi-sleep
+++ a/arch/i386/kernel/acpi/wakeup.S
@@ -11,7 +11,22 @@
#
# If physical address of wakeup_code is 0x12345, BIOS should call us with
# cs = 0x1234, eip = 0x05
-#
+#
+
+#define BEEP \
+ inb $97, %al; \
+ outb %al, $0x80; \
+ movb $3, %al; \
+ outb %al, $97; \
+ outb %al, $0x80; \
+ movb $-74, %al; \
+ outb %al, $67; \
+ outb %al, $0x80; \
+ movb $-119, %al; \
+ outb %al, $66; \
+ outb %al, $0x80; \
+ movb $15, %al; \
+ outb %al, $66;
ALIGN
.align 4096
@@ -20,6 +35,9 @@ wakeup_code:
wakeup_code_start = .
.code16
+# Uncomment this to make your computer start producing ugly noise as soon
+# as BIOS returns to this real-mode entry point.
+# BEEP
movw $0xb800, %ax
movw %ax,%fs
movw $0x0e00 + 'L', %fs:(0x10)
_
Patches currently in -mm which might be from pavel@xxxxxx are
working-3d-dri-intel-agpko-resume-for-i815-chip.patch
git-input.patch
x86_64-pm_trace-support.patch
i386-do-not-restore-reserved-memory-after-hibernation.patch
i386-do-not-restore-reserved-memory-after-hibernation-fix.patch
acpi-preserve-the-ebx-value-in-acpi_copy_wakeup_routine.patch
freezer-make-kernel-threads-nonfreezable-by-default.patch
freezer-make-kernel-threads-nonfreezable-by-default-fix.patch
freezer-make-kernel-threads-nonfreezable-by-default-fix-fix.patch
freezer-make-kernel-threads-nonfreezable-by-default-fix-2.patch
pm-do-not-require-dev-spew-to-get-pm_debug.patch
swsusp-remove-incorrect-code-from-userc.patch
swsusp-remove-code-duplication-between-diskc-and-userc.patch
swsusp-introduce-restore-platform-operations.patch
swsusp-fix-hibernation-code-ordering.patch
hibernation-prepare-to-enter-the-low-power-state.patch
freezer-avoid-freezing-kernel-threads-prematurely.patch
freezer-use-__set_current_state-in-refrigerator.patch
freezer-return-int-from-freeze_processes.patch
freezer-remove-redundant-check-in-try_to_freeze_tasks.patch
pm-introduce-hibernation-and-suspend-notifiers.patch
pm-introduce-hibernation-and-suspend-notifiers-fix.patch
pm-introduce-hibernation-and-suspend-notifiers-tidy.patch
pm-introduce-hibernation-and-suspend-notifiers-fix-fix.patch
pm-disable-usermode-helper-before-hibernation-and-suspend.patch
pm-disable-usermode-helper-before-hibernation-and-suspend-fix.patch
beeping-patch-for-debugging-acpi-sleep.patch
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