[Linaro-open-discussions] Re: [Question] System suspend/resume functionality on ARM64 VM does seem to be working?

On Thu, Jul 27, 2023 at 04:15:46PM +0100, Salil Mehta wrote:

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Typically I use RTC on systems as I need not physical access to the platform to test that. $echo +20 > /sys/class/rtc/rtc0/wakealarm $ echo mem > /sys/power/state

This might not work as after putting the VM into s2idle state VM kind of hangs and becomes unresponsive.

That's strange, I tried Sudeep's command on QEMU and Linux master and it does wake up the system after 20 seconds (with /sys/power/mem_sleep as "[s2idle]"). I was curious because last time I needed to test suspend, I had to update the DT to set the console interrupt as a wakeup source. This RTC method is a lot better.

Thanks, Jean