Long delay after KDE login (Kubuntu 13.04)

This is caused by Pulseaudio being started twice. There are 2 files in /etc/xdg/autostart:

  • pulseaudio.desktop
  • pulseaudio-kde.desktop

Add the following line in pulseaudio.desktop:

NotShowIn=KDE

Source: https://bugs.kde.org/show_bug.cgi?id=312560.