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 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mir in Ubuntu. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1532607/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

