[Bug 1540830] [NEW] After Plasma 5.5.3 - apt-check causes massive load / creates 100's of processes

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Since upgrading to Plasma 5.5.3 (via 15.10 backports PPA) every morning
my machine is unusable.

This morning the load was over 100 on my desktop - there were hundreds
of apt-check processes, plasma had completely crashed bar one konsole
window.

I have to sysRq to reboot...

Looks like others are having similar issues

https://www.kubuntuforums.net/showthread.php?69575-apt-check-hogs-100
-CPU-and-memory-after-Plasma-5-5-3-upgrade

http://ubuntuforums.org/showthread.php?t=2310711&goto=newpost/

https://www.reddit.com/r/Kubuntu/comments/43ntbg/plasma_freezing_my_computer_every_day/

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: update-notifier-common 3.163
ProcVersionSignature: Ubuntu 4.2.0-27.32-generic 4.2.8-ckt1
Uname: Linux 4.2.0-27-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: KDE
Date: Tue Feb  2 09:40:52 2016
InstallationDate: Installed on 2015-04-28 (279 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
PackageArchitecture: all
SourcePackage: update-notifier
UpgradeStatus: Upgraded to wily on 2015-11-11 (82 days ago)

** Affects: muon (Ubuntu)
     Importance: Critical
         Status: Confirmed


** Tags: amd64 apport-bug wily
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After Plasma 5.5.3 - apt-check causes massive load / creates 100's of processes
https://bugs.launchpad.net/bugs/1540830
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