Software updater popup consumes 15-20% CPU doing absolutely nothing

[teo1978]

The popup that tells you that the computer needs to be restarted to finish installing updates (with the choice whether to restart now or later), consumes 15% to 20% CPU.

That's f***ing ridiculous, there's no reason why a popup, that is just there doing nothing waiting for you to click one of its buttons, should consume even a detectable amount of CPU time.

By the way, I don't know why the popup was even there to begin with: I didn't install any updates (it usually asks me). I don't know whether it installed somoe updates without asking me, or if the popup nonsensically appeared for no reason. Either way, it's idiotic.

Anyway, after I closed it, update-manager stopped consuming CPU.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: update-manager 1:16.04.15
ProcVersionSignature: Ubuntu 4.4.0-135.161-generic 4.4.140
Uname: Linux 4.4.0-135-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Nov 21 18:25:13 2018
GsettingsChanges:
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'window-height' b'412'
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'window-width' b'484'
 b'com.ubuntu.update-manager' b'launch-time' b'int64 1542788146'
InstallationDate: Installed on 2013-10-11 (1866 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)