[Bug 1637180] Please test proposed package

[Adam Conrad]

Hello Giuseppe, or anyone else affected,

Accepted update-manager into bionic-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/update-
manager/1:18.04.11.2 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-bionic to verification-done-bionic. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-bionic. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

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https://bugs.launchpad.net/bugs/1637180

Title:
  "The computer needs to restart" dialog constantly eats CPU

Status in One Hundred Papercuts:
  Fix Released
Status in update-manager package in Ubuntu:
  Fix Released
Status in update-manager source package in Artful:
  Confirmed
Status in update-manager source package in Bionic:
  Fix Committed

Bug description:
  [Impact]
  Ubuntu users wishing to run updates, potentially with specific combinations of customized theming on their desktop.

  [Test case]
  1) Run update-manager
  2) Apply updates (this should include an update that requires reboot, such as a kernel update, system library (libc?)...
  3) Let the "This computer needs to restart" dialog appear.

  [Regression potential]
  Failure of the "restart" dialog to appear or screen/window corruption when this dialog appears should be investigated as possible regressions. It is also possible that the behavior of the window changes in that its size might not remain static.

  
  ---

  After installing certain updates (kernel, system libraries, etc.), the
  "The computer needs to restart" dialog appears periodically, prompting
  the user to restart the system.

  That dialog eats a constant 8-10% of CPU time. That's the issue. (Yes,
  update-manager is niced to 10, but why consuming *any* CPU at all for
  showing a static dialog?)

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: update-manager 1:16.04.4
  ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
  Uname: Linux 4.4.0-38-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Oct 27 14:07:11 2016
  ExecutablePath: /usr/bin/update-manager
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'show-details' b'true'
   b'com.ubuntu.update-manager' b'window-height' b'766'
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'window-width' b'939'
   b'com.ubuntu.update-manager' b'launch-time' b'1477544773'
  InstallationDate: Installed on 2016-04-22 (188 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  InterpreterPath: /usr/bin/python3.5
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: No upgrade log present (probably fresh install)

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