[Bug 1642653] [NEW] High cpu Xorg kwin_X11 after 16.10 upgrade

[Richard]

Public bug reported:

After an upgrade to 16.10 on a 2-core 4-thread 2015 cpu system
i915 i5-5287U KDE X

Xorg has 11.9% cpu at idle, 4x that of Ubuntu 16.04
kwin_X11 has cpu about 10%, too

This causes the fan to run at 4600 RPM which is very noisy as opposed to 3200 RPM which is inaudible
temp is 79.0°C which is about 12 C higher

There does not seem to be a gtk app exhibiting high cpu, they are all
still below 4%

Basically Chromium Konsole LibreOffice

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: kwin-x11 4:5.7.5-0ubuntu2
ProcVersionSignature: Ubuntu 4.8.0-27.29-generic 4.8.1
Uname: Linux 4.8.0-27-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Nov 17 08:34:09 2016
SourcePackage: kwin
UpgradeStatus: Upgraded to yakkety on 2016-11-16 (0 days ago)

** Affects: kwin (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug yakkety

-- 
You received this bug notification because you are a member of Kubuntu
Bugs, which is subscribed to kwin in Ubuntu.
https://bugs.launchpad.net/bugs/1642653

Title:
  High cpu Xorg kwin_X11 after 16.10 upgrade

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/kwin/+bug/1642653/+subscriptions