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[Bug 1532607] Re: Phone not usable while a call comes in - followed by "restart"

 

I have seen a similar symptom twice in the past 4 days In both cases a
new SMS followed an exchange of SMS's within the previous minute. I hear
the notification, phone is in pocket so proximity will be enabled, take
phone out and it stays black, pressing power does not turn on the
screen, then the UI restarts.

There were not crash files.

I see the same Mir exception in the unity log as noted in comment 6

** Attachment added: "unity8.log.1"
   https://bugs.launchpad.net/canonical-devices-system-image/+bug/1532607/+attachment/4553335/+files/unity8.log.1

** Changed in: canonical-devices-system-image
       Status: Incomplete => Confirmed

** Changed in: canonical-devices-system-image
   Importance: High => Critical

** Changed in: canonical-devices-system-image
    Milestone: None => ww08-2016

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https://bugs.launchpad.net/bugs/1532607

Title:
  Phone not usable while a call comes in - followed by "restart"

Status in Canonical System Image:
  Confirmed
Status in Mir:
  New
Status in mir package in Ubuntu:
  Confirmed
Status in qtmir package in Ubuntu:
  Confirmed

Bug description:
  My system:

  current build number: 225
  device name: krillin
  channel: ubuntu-touch/rc-proposed/bq-aquaris.en
  last update: 2016-01-09 06:52:53
  version version: 225
  version ubuntu: 20160109
  version device: 20151216-378d4f3
  version custom: 20151111--36-46-vivid

  What happened:
  Someone called me and I wanted to take the call on the phone (nothing attached to the phone). The screen was locked and I pressed the power button to unlock the screen. The phone did not react on any pushed buttons. The phone continued ringing but I was not able to do anything with the phone during this time.

  During the next minute the phone was blocked. After this period a
  "restart" followed.

  "Restart":
  The restart was not a real reset. The phone screen was black. Then approx. 1 - 2 minutes after the call was gone, the screen went on again and the ubuntu logo with the dots appeared (same screen when you start the phone but without the "bq"-screen). 

  I did not need to enter the PIN code of the SIM card. The phone was
  again fully operational.

  This happened on January, 10th at approx. 13:30 h. I have attached the
  sys.log for your review and hopefully for tracing back the issue to
  the root cause.

  Matthias

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