So, while debugging this issue I found the following: The delay seems to be bigger if wifi is disabled. If wifi is enabled, after 1:30 at most the device wakes up, and if no wifi, device seems to remain off indefinitely (I waited only for 10 minutes then gave up). In my case, it's krillin and I have only one sim in the second slot. At first I thought that could be lack of entropy and the system would be stuck trying to read from /dev/urandom, but turns out this is what I found:
1) oFono delivers the message to telepathy-ofono right away. 2) telepathy-ofono informs telepathy about the new message. 3) telephony-service-indicator gets the message, sets a timer (QTimer::singleShot()) of 1.5 seconds before displaying the message (that's to avoid displaying notifications for messages that were already displayed in messaging-app. 4) Then I noticed that the triggered() signal is never emitted, until I manually force the device to wake up. 5) running an strace on telephony-service-indicator and (leaving the device stuck for about 1 minute) I get this: [pid 2231] 1474573884.069934 clock_gettime(CLOCK_MONOTONIC, {1265, 272122461}) = 0 [pid 2231] 1474573884.070193 clock_gettime(CLOCK_MONOTONIC, {1265, 272383307}) = 0 [pid 2231] 1474573884.070407 poll([{fd=3, events=POLLIN}, {fd=6, events=POLLIN}, {fd=7, events=POLLIN}, {fd=10, events=POLLIN}, {fd=11, events=POLLIN}], 5, 1571) = 0 (Timeout) [pid 2231] 1474573951.500698 read(3, 0xbed2817c, 16) = -1 EAGAIN (Resource temporarily unavailable) [pid 2231] 1474573951.500977 clock_gettime(CLOCK_MONOTONIC, {1266, 845932613}) = 0 [pid 2231] 1474573951.501380 clock_gettime(CLOCK_MONOTONIC, {1266, 846369074}) = 0 Someone please correct me if I am missing something, but from my understanding qt is stuck in the event loop waiting for the timer event, which only happens after I press the power button. What worries me here is that the call to poll() explicitly sets the timeout for 1571 (1.5 seconds), and -apparently- it only timed out after 67 seconds, which is when the next call to read() is executed. An additional information is that on dbus I always see indicator- datetime emitting a signal (Changed()) as soon as telephony-service- indicator also gets unblocked, which is a strong indication that indicator-datetime is also getting affected by this. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1516696 Title: SMS notifications are received only when the phone is unlocked To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1516696/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs