[Bug 1584604] [NEW] Slow login to kde5 waiting on networkmanager

[Con Kolivas]

Public bug reported:

I still get the slow login as happened with kubuntu 15.10 now on a fresh
install of kubuntu 16.04 on multiple systems.

The pause is identical to as happened in this bug which is marked as
closed, but it does not appear to be bluetooth related this time:
https://bugs.launchpad.net/bugs/1509334 Other people have tried to
report the same bug as an addendum but it was closed, hence why I'm
opening a new bug.

The kde throbber reaches 100% very quickly and then there is a pause where there is no activity and then the desktop finally appears many seconds later. A systemd analyze blame shows the following as top10:
          5.997s NetworkManager-wait-online.service
          2.469s postgresql at 9.3-main.service
          2.457s postgresql at 9.4-main.service
          2.365s postgresql at 9.5-main.service
           646ms networking.service
           558ms ModemManager.service
           534ms accounts-daemon.service
           520ms systemd-logind.service
           436ms grub-common.service
           423ms ondemand.service

Switching to xfce4 there is no delay at all on login.

** Affects: plasma-nm (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1584604

Title:
  Slow login to kde5 waiting on networkmanager

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