[Bug 1073728] Re: software sources window takes long time to open with little user feedback

[Donjan Rodic]

Same problem here, Ubuntu 13.04, waiting 10-20 seconds on a new machine every single start (even consequtive, obviously no caching).
The silly part is that I don't want or am even able to use "Additional Drivers", while editing the software sources on a 12.04 LTS system with much lower specs (and HDD instead of SSD) right next to this is nice and snappy.

Could we please do the driver detection only when this tab is selected?
I can confidently claim that the vast majority of users spends much more
time in the "Ubuntu Software", "Other Software" and "Updates" tabs than
in the "Additional Drivers", plus  Intel users (afairc the majority) and
those who could but never install additional drivers shouldn't have to
sit there while their machine is wasting cycles without purpose...

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https://bugs.launchpad.net/bugs/1073728

Title:
  software sources window takes long time to open with little user
  feedback

Status in “software-properties” package in Ubuntu:
  Triaged

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.

  This is similar to bug 1070868 but from a different starting point.
  Fixing bug 780776 would be one way of fixing this bug.

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