linux - Qt - How to detect Resume from Standby & Mem states -


we developing embedded device based on am335x sdk ti (based on arago project)

the main application on device being developed using qt4.8

we want detect when device entering standby / mem states can save data , suspend our main application

we want detect when device resuming these states main application can resumed correctly

does have experience / information / links how may achieved?

i've found solution issue above.

on our system standby / mem state can invoked via script /usr/bin/pm_suspend.sh in turn calls echo mem > /sys/power/state suspend device memory.

i've added kill -usr2 {app.pid} before call suspend , kill -usr1 {app.pid} after.

my application understands usr2 signal save our data , delete our main form , usr1 signal spawn new instance of our main form.


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