touch-packages team mailing list archive

[Pat McGowan <pat.mcgowan@xxxxxxxxxxxxx>]

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

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

** Changed in: canonical-devices-system-image
    Milestone: None => ww05-2015

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https://bugs.launchpad.net/bugs/1410506

Title:
  MTP looping between start and stopping causing constant ~10% cpu load

Status in the base for Ubuntu mobile products:
  Confirmed
Status in mtp package in Ubuntu:
  Confirmed
Status in mtp package in Ubuntu RTM:
  New

Bug description:
  When unplugged from USB, I notice when running $ top that init, dbus-
  daemon, mpdecision are constantly using in total ~10% CPU.

  The steps I have performed to cause this:
  1) Ensure the device is off
  2) Plug a USB cable into the device and a computer with MTP support
  3) Boot the device
  4) Unlock the device, run the terminal and the command $ top
  5) Wait until the CPU settles, then unplug the USB cable
  6) Now notice that init, dbus-daemon, mpdecision start using ~10% CPU

  This is the output from running dbus-monitor [0]

  Note that when I plugged my device into a PC the CPU usage reduced
  back to normal, but then when I unplugged it again it increased back
  to ~10% again.

  0 - http://pastebin.ubuntu.com/9734788/

  $ system-image-cli -i
  current build number: 161
  device name: mako
  channel: ubuntu-touch/ubuntu-rtm/devel-proposed
  alias: ubuntu-touch/ubuntu-rtm/14.09-proposed
  last update: 2015-01-13 18:37:40
  version version: 161
  version ubuntu: 20150113
  version device: 20141119
  version custom: mako-1.1

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