Still trying to get my head around this. If I manually create a wakelock:
sudo bash -c "echo mylock > /sys/power/wake_lock"
then I can't reproduce the bug (tried 20 times anyway). If I remove that
wakelock:
sudo bash -c "echo mylock > /sys/power/wake_unlock"
then yes, I get the bug again. Sadly there's no /proc/wakelocks to get the
wakelock state.
Seeing the Greeter have a black background makes me suspicious too. Is
phone going to deep sleep before unity8 is ready - as Greeter should be
drawn on screen after display is turned off, not before display is
turned on.
I need to learn how powerd is interacting with wakelocks
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https://bugs.launchpad.net/bugs/1309915
Title:
foreground app should keep wakelock open until actual suspend happens
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