Opening "Software Sources" through Ubuntu Software Center causes 100% CPU

[Kent deVillafranca]

Binary package hint: software-center

After opening the Ubuntu Software Center, going to Edit->Software Sources causes the Software Center to increase the CPU usage to 100%. After the Software Sources window is closed, CPU usage returns to normal. Opening Software Sources from the System->Administration menu doesn't cause this (no matter whether the Ubuntu Software Center is open or not).

This is using a system that had a fresh install of Jaunty, and was just upgraded to Karmic.

TEST CASE:
1. use software-center from lucid
2. click on the menu edit/software sources
3. verify that the cpu goes to 100%
4. close the apps
5. install software-center from lucid-proposed
6. repeat step 2
7. verify that the cpu is no longer at 100%

ProblemType: Bug
Architecture: i386
Date: Fri Oct 23 21:42:28 2009
DistroRelease: Ubuntu 9.10
Package: software-center 1.0.1
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: software-center
Uname: Linux 2.6.31-14-generic i686

[Waldir Leoncio (wleoncio)]

Reproduced on a fresh Karmic install.

[MillenniumBug (millenniumbug)]

Reproduced on 10.04 alpha 3 with all updates.

[MillenniumBug (millenniumbug)]

in Software Centre version 1.1.16.1

[Kent deVillafranca (kdevilla)]

I'm still able to reproduce this bug in Lucid beta 1.

[Omer Akram (om26er)]

This bug is still reproduce able in software center 2.0

[Olivier Tilloy (osomon)]

It looks like subprocess.Popen.poll() is the culprit. Calling it too often (e.g. when idle) results in a very high CPU consumption.

[Martin Pitt (pitti)]

Accepted software-center into lucid-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

[Kent deVillafranca (kdevilla)]

That fixed it. With the version of software-center from lucid-proposed installed, CPU usage is no longer a problem when "software sources" is opened.

[Launchpad Janitor (janitor)]

This bug was fixed in the package software-center - 2.0.3

---------------
software-center (2.0.3) lucid-proposed; urgency=low

  [ Michael Vogt ]
  * debian/control:
    - updated Vcs-Bzr location to point to lucid branch
  * softwarecenter/apt/aptcache.py:
    - fix flickering when a application is instaleld (LP: #563163)

  [ Olivier Tilloy ]
  * data/templates/AppDetailsView.html:
    - fix missing padding for small details window sizes (LP: #560026)
  * softwarecenter/view/widgets/searchentry.py:
   - Set the search entry's text color to black when not empty.
     This makes it readable on dark themes with a light text color by
     default (LP: #500174)
  * softwarecenter/app.py:
    - avoid 100% usage when waiting for software-sources to finish
      (LP: #459521)
  * softwarecenter/view/navhistory.py:
    - keep the search terms updated to ensure the navigation history
      always has the latest used search terms (LP: #537512)

  [ Kiwinote ]
  * data/featured.menu.in:
    - Update featured applications list per Desktop team (LP: #548534)
    - Feature 'fretsonfire-game' rather than 'fretsonfire' (LP: #538646)
 -- Michael Vogt <email address hidden> Tue, 27 Apr 2010 19:06:44 +0200

[Martin Pitt (pitti)]

Copied lucid-proposed to maverick.

[Launchpad Janitor (janitor)]

This bug was fixed in the package software-center - 2.0.3

---------------
software-center (2.0.3) lucid-proposed; urgency=low

  [ Michael Vogt ]
  * debian/control:
    - updated Vcs-Bzr location to point to lucid branch
  * softwarecenter/apt/aptcache.py:
    - fix flickering when a application is instaleld (LP: #563163)

  [ Olivier Tilloy ]
  * data/templates/AppDetailsView.html:
    - fix missing padding for small details window sizes (LP: #560026)
  * softwarecenter/view/widgets/searchentry.py:
   - Set the search entry's text color to black when not empty.
     This makes it readable on dark themes with a light text color by
     default (LP: #500174)
  * softwarecenter/app.py:
    - avoid 100% usage when waiting for software-sources to finish
      (LP: #459521)
  * softwarecenter/view/navhistory.py:
    - keep the search terms updated to ensure the navigation history
      always has the latest used search terms (LP: #537512)

  [ Kiwinote ]
  * data/featured.menu.in:
    - Update featured applications list per Desktop team (LP: #548534)
    - Feature 'fretsonfire-game' rather than 'fretsonfire' (LP: #538646)
 -- Michael Vogt <email address hidden> Tue, 27 Apr 2010 19:06:44 +0200