Thanks for your bugreport.
It appears this is caused by both ubuntu-desktop and xubuntu-desktop being installed.
ubuntu-desktop depends on libsdl1.2debian-pulseaudio and that conflicts on libsdl1.2debian-alsa
xubuntu-desktop recommends libsdl1.2debian-alsa and that conflicts on libsdl1.2debian-pulseaudio
Thanks for your bugreport.
It appears this is caused by both ubuntu-desktop and xubuntu-desktop being installed.
ubuntu-desktop depends on libsdl1. 2debian- pulseaudio and that conflicts on libsdl1. 2debian- alsa
xubuntu-desktop recommends libsdl1. 2debian- alsa and that conflicts on libsdl1. 2debian- pulseaudio