[Bug 1073728] [NEW] Software Updater settings window takes long time to open with little user feedback

[Mark]

Public bug reported:

I'm using Lubuntu 12.10 in a VirtualBox VM.

Run Software Updater. When the main window opens, click the Settings...
button at the bottom left. The settings window takes several seconds to
appear, and other than the main window contents being greyed out, there
is no indication that anything is happening. (The CPU appears to be
maxed-out until the settings window opens, so the delay would probably
be much longer on slower machines.)

It would be good if a busy mouse pointer could be set, so the user knows
something is happening, instead of possibly thinking that Software
Updater has hung/locked up.


Each time you click Settings... there is the same long delay while the CPU is maxed-out doing whatever it's doing. Would it be possible to cache whatever is being calculated in order to open the settings window? Then if the user selects Settings... again in the same session, the settings window could appear almost immediately.

Another optimisation could be made for the delay after the user
dismisses the settings window. If you close the settings window without
making any changes, the CPU is again maxed-out for a few seconds before
the Software Updater window is un-greyed-out. Since no changes were
made, it should be possible for the Software Updater window to
immediately become responsive in that case.

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to update-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1073728

Title:
  Software Updater settings window takes long time to open with little
  user feedback

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  I'm using Lubuntu 12.10 in a VirtualBox VM.

  Run Software Updater. When the main window opens, click the
  Settings... button at the bottom left. The settings window takes
  several seconds to appear, and other than the main window contents
  being greyed out, there is no indication that anything is happening.
  (The CPU appears to be maxed-out until the settings window opens, so
  the delay would probably be much longer on slower machines.)

  It would be good if a busy mouse pointer could be set, so the user
  knows something is happening, instead of possibly thinking that
  Software Updater has hung/locked up.

  
  Each time you click Settings... there is the same long delay while the CPU is maxed-out doing whatever it's doing. Would it be possible to cache whatever is being calculated in order to open the settings window? Then if the user selects Settings... again in the same session, the settings window could appear almost immediately.

  Another optimisation could be made for the delay after the user
  dismisses the settings window. If you close the settings window
  without making any changes, the CPU is again maxed-out for a few
  seconds before the Software Updater window is un-greyed-out. Since no
  changes were made, it should be possible for the Software Updater
  window to immediately become responsive in that case.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1073728/+subscriptions