From 60417f5976df029227450b46d7fa6f0e9b1e654c Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 8 Jan 2008 00:07:39 +0100 Subject: ACPI suspend: Call _PTS before suspending devices The ACPI 1.0 specification wants us to put devices into low power states after executing the _PTS global control method, while ACPI 2.0 and later want us to do that in the reverse order. The current suspend code follows ACPI 2.0 in that respect which causes some ACPI 1.0x systems to hang during suspend (ref. http://bugzilla.kernel.org/show_bug.cgi?id=9528). Make the suspend code execute _PTS before putting devices into low power states (ie. in accordance with ACPI 1.0x) and provide a command line option to override the default if need be. Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown --- Documentation/kernel-parameters.txt | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation/kernel-parameters.txt') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 92c40d174355..cf3868956f1e 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -168,6 +168,11 @@ and is between 256 and 4096 characters. It is defined in the file acpi_irq_isa= [HW,ACPI] If irq_balance, mark listed IRQs used by ISA Format: ,... + acpi_new_pts_ordering [HW,ACPI] + Enforce the ACPI 2.0 ordering of the _PTS control + method wrt putting devices into low power states + default: pre ACPI 2.0 ordering of _PTS + acpi_no_auto_ssdt [HW,ACPI] Disable automatic loading of SSDT acpi_os_name= [HW,ACPI] Tell ACPI BIOS the name of the OS -- cgit v1.2.2