From 08b98d3291652bdcd1029a059e39fbcae5ad93e2 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 17 Nov 2016 03:28:53 +0100 Subject: PM / sleep / ACPI: Use the ACPI_FADT_LOW_POWER_S0 flag Modify the ACPI system sleep support setup code to select suspend-to-idle as the default system sleep state if the ACPI_FADT_LOW_POWER_S0 flag is set in the FADT and the default sleep state was not selected from the kernel command line. Signed-off-by: Rafael J. Wysocki Tested-by: Mario Limonciello --- Documentation/power/states.txt | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'Documentation/power') diff --git a/Documentation/power/states.txt b/Documentation/power/states.txt index 008ecb588317..8a39ce45d8a0 100644 --- a/Documentation/power/states.txt +++ b/Documentation/power/states.txt @@ -35,7 +35,9 @@ only one way to cause the system to go into the Suspend-To-RAM state (write The default suspend mode (ie. the one to be used without writing anything into /sys/power/mem_sleep) is either "deep" (if Suspend-To-RAM is supported) or "s2idle", but it can be overridden by the value of the "mem_sleep_default" -parameter in the kernel command line. +parameter in the kernel command line. On some ACPI-based systems, depending on +the information in the FADT, the default may be "s2idle" even if Suspend-To-RAM +is supported. The properties of all of the sleep states are described below. -- cgit v1.2.3-59-g8ed1b