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by codedokode 562 days ago
Out of curiosuty, I looked through logs at my laptop after it wakes up and here is what is present there:

> kernel: ACPI: PM: Waking up from system sleep state S3

> kernel: CPU1 is up

> kernel: smpboot: Booting Node 0 Processor 1 APIC 0x1

> kernel: Enabling non-boot CPUs

> kernel: ACPI: PM: Low-level resume complete

So of course it might be not a "real" S3, but I didn't have a chance to test how long the laptop battery can last in suspended mode.
1 comments
mananaysiempre 562 days ago
No, that is in fact what going out of real S3 looks like, SMP bringup and all. For comparison, here's going in and out of S0ix (aka suspend-to-idle aka "s2idle" even though it has nothing to do with ACPI S2) on my laptop (with messages from amdgpu, etc., snipped):

  PM: suspend entry (s2idle)
  Filesystems sync: 0.012 seconds
  Freezing user space processes
  Freezing user space processes completed (elapsed 0.003 seconds)
  OOM killer disabled.
  Freezing remaining freezable tasks
  Freezing remaining freezable tasks completed (elapsed 0.002 seconds)
  printk: Suspending console(s) (use no_console_suspend to debug)
  atkbd serio0: Disabling IRQ1 wakeup source to avoid platform firmware bug   <-- this is the Framework workaround
  pcieport 0000:00:08.3: quirk: disabling D3cold for suspend
  ACPI: EC: interrupt blocked
  ACPI: EC: interrupt unblocked
  OOM killer enabled.
  Restarting tasks ...
  done.
  random: crng reseeded on system resumption
  PM: suspend exit
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