Aliendalvik restart stalls until phone wakeup

asked 2016-11-20 13:13:59 +0200

Federico gravatar image

updated 2016-11-20 13:27:27 +0200

Step to reproduce on my Jolla C:

  1. Press the power button to power off the display (I have no device lock code set)
  2. SSH into the phone, as root.
  3. Type systemctl restart aliendalvik.

Expected:

  • The command completes almost immediately and restarts the Android layer.

Observed:

  • The command stalls indefinitely (does nothing and does not terminate).
  • If I Press the power button once more to wake up the phone, now the command terminates and I get the command prompt again.

This seems unusual. If I restart some other service, for instance bluetooth, the command completes immediately.

I stumbled upon this behavior while looking for workarounds for Whatsapp messages arriving late and the web client web.whatsapp.com not working -- it seems that restarting the Android layer "wakes up" the Whatsapp app.

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Comments

Does the same happen if the display is on? It could be that your cpu is underclocked and all commands are slow.

bomo ( 2016-11-21 14:58:59 +0200 )edit

@bomo No, the command takes under a second to complete when the display is on.

Federico ( 2016-11-21 15:00:22 +0200 )edit
1

But that's what i just wanted to say. If your screen is off then the cpu is running on a lower frequency and thus slower (to save power). it's not a bug but a feature.

bomo ( 2016-11-21 15:23:57 +0200 )edit