https://bugzilla.kernel.org/show_bug.cgi?id=102991
Bug ID: 102991
Summary: Please add API for querying the resume cause
Product: ACPI
Version: 2.5
Kernel Version: 3.16
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: enhancement
Priority: P1
Component: Power-Sleep-Wake
Assignee: [email protected]
Reporter: [email protected]
Regression: No
The purpose of this API - is support of delayed hibernation (feature that works
for a long time in Windows). A laptop first Suspend to RAM, then after a time
save state to disk and power off completely. But system must know the reason of
waking up (was it user or turning into hibernation). RTC wakeup event isn't
reliable.
SystemD needs such API, see more at
https://github.com/systemd/systemd/issues/926
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