It looks like subprocess.Popen.poll() is the culprit. Calling it too often (e.g. when idle) results in a very high CPU consumption.
** Changed in: software-center (Ubuntu) Status: Confirmed => In Progress ** Changed in: software-center (Ubuntu) Assignee: (unassigned) => Olivier Tilloy (osomon) -- Opening "Software Sources" through Ubuntu Software Center causes 100% CPU https://bugs.launchpad.net/bugs/459521 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs