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[Ricardo Salveti <rsalveti@xxxxxxxxxxxx>]

Please get the content available at /proc/last_kmsg after a device
reboots, that's the only way to get the kernel crash trace.

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https://bugs.launchpad.net/bugs/1387949

Title:
  power cycling Emerson EM229 headset caused phone to reboot

Status in “bluez” package in Ubuntu:
  New

Bug description:
  While sanity testing krillin rtm image 139, I paired a bluetooth
  headset.  I made a call with it, hung up, then turned the headset off.
  I noticed this caused the BT indicator icon to invert, which is a nice
  way to indicate whether something is connected.  So, I turned the
  device back on, waited for the icon to invert, turned the device off,
  waited, and instead of inverting the icon...  the phone rebooted.

  Not sure what exactly failed here, like which component, but it's
  definitely not good when a paired headset can cause the phone to
  spontaneously reboot.

  I don't see any relevant .crash files, and all I see in syslog from
  that time is this:

  Oct 30 23:42:27 ubuntu-phablet NetworkManager[1429]: <warn> Activation (/ril_1) failed for connection '/310410695117999/context1'
  Oct 30 23:42:27 ubuntu-phablet NetworkManager[1429]: <info> (/ril_1): device state change: failed -> disconnected (reason 'none') [120 30 0]
  Oct 30 23:42:27 ubuntu-phablet NetworkManager[1429]: <info> (/ril_1): deactivating device (reason 'none') [0]
  Oct 30 23:43:01 ubuntu-phablet kernel: [  747.229681][Ker_PM][request_suspend_state]wakeup (3->0) at 747214006509 (2014-10-31 05:43:01.704759580 UTC)
  Oct 30 23:43:02 ubuntu-phablet kernel: [  747.779813]mtk-tpd: TPD wake up
  Oct 30 23:43:02 ubuntu-phablet kernel: [  747.816572]mtk-tpd: TPD wake up done
  Oct 30 23:43:02 ubuntu-phablet kernel: [  747.816593]<MAGNETIC>  mag_context_obj ok------->hwm_obj->early_suspend=0 
  Oct 30 23:43:09 ubuntu-phablet dbus[769]: [system] Activating service name='org.freedesktop.systemd1' (using servicehelper)
  Oct 30 23:43:09 ubuntu-phablet dbus[769]: [system] Successfully activated service 'org.freedesktop.systemd1'
  Oct 30 23:43:09 ubuntu-phablet rsyslogd: [origin software="rsyslogd" swVersion="7.4.4" x-pid="771" x-info="http://www.rsyslog.com";] exiting on signal 15.
  Oct 30 23:43:42 ubuntu-phablet rsyslogd: [origin software="rsyslogd" swVersion="7.4.4" x-pid="785" x-info="http://www.rsyslog.com";] start
  Oct 30 23:43:42 ubuntu-phablet rsyslogd-2307: warning: ~ action is deprecated, consider using the 'stop' statement instead [try http://www.rsyslog.com/e/2307 ]
  Oct 30 23:43:42 ubuntu-phablet rsyslogd-2307: warning: ~ action is deprecated, consider using the 'stop' statement instead [try http://www.rsyslog.com/e/2307 ]
  Oct 30 23:43:42 ubuntu-phablet rsyslogd: rsyslogd's groupid changed to 103
  Oct 30 23:43:42 ubuntu-phablet rsyslogd: rsyslogd's userid changed to 100
  Oct 30 23:43:42 ubuntu-phablet kernel: [    0.000000]Booting Linux on physical CPU 0
  Oct 30 23:43:42 ubuntu-phablet kernel: [    0.000000]Initializing cgroup subsys cpu
  Oct 30 23:43:42 ubuntu-phablet kernel: [    0.000000]Linux version 3.4.67 (root@android-barajas_1414177384) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Tue Oct 28 11:57:42 UTC 2014

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