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[Bug 1422898] Re: Excessive CPU usage, even when the screen is turned off

 

Fixed in
https://launchpad.net/ubuntu/+source/qtmir/0.4.4+15.04.20150220-0ubuntu1

Until new image is created, you can just:
adb shell
sudo apt update
sudo apt dist-upgrade

** Package changed: unity8 (Ubuntu) => qtmir (Ubuntu)

** Changed in: qtmir (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1422898

Title:
  Excessive CPU usage, even when the screen is turned off

Status in qtmir package in Ubuntu:
  Fix Released

Bug description:
  Since mako image r102 (vivid-proposed), the CPU usage of Unity8 is very excessive and increasing over time.
  After boot, the phone runs smooth but after some time it lags heavily.

  As you can see from the attached output of the "top" command, Unity8
  consumes 23% of CPU power when the screen is TURNED OFF (command run
  via adb). When the screen is on, this figure is much higher and
  sometimes rises up to 60%.

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References