diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-power')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-power | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power index 5e6ead29124c..51c0f578bfce 100644 --- a/Documentation/ABI/testing/sysfs-power +++ b/Documentation/ABI/testing/sysfs-power @@ -47,14 +47,18 @@ Description: suspend-to-disk mechanism. Reading from this file returns the name of the method by which the system will be put to sleep on the next suspend. There are four methods supported: + 'firmware' - means that the memory image will be saved to disk by some firmware, in which case we also assume that the firmware will handle the system suspend. + 'platform' - the memory image will be saved by the kernel and the system will be put to sleep by the platform driver (e.g. ACPI or other PM registers). + 'shutdown' - the memory image will be saved by the kernel and the system will be powered off. + 'reboot' - the memory image will be saved by the kernel and the system will be rebooted. @@ -74,12 +78,12 @@ Description: The suspend-to-disk method may be chosen by writing to this file one of the accepted strings: - 'firmware' - 'platform' - 'shutdown' - 'reboot' - 'testproc' - 'test' + - 'firmware' + - 'platform' + - 'shutdown' + - 'reboot' + - 'testproc' + - 'test' It will only change to 'firmware' or 'platform' if the system supports that. @@ -114,9 +118,9 @@ Description: string representing a nonzero integer into it. To use this debugging feature you should attempt to suspend - the machine, then reboot it and run + the machine, then reboot it and run:: - dmesg -s 1000000 | grep 'hash matches' + dmesg -s 1000000 | grep 'hash matches' If you do not get any matches (or they appear to be false positives), it is possible that the last PM event point @@ -244,6 +248,7 @@ Description: wakeup sources created with the help of /sys/power/wake_lock. When a string is written to /sys/power/wake_unlock, it will be assumed to represent the name of a wakeup source to deactivate. + If a wakeup source object of that name exists and is active at the moment, it will be deactivated. |