Everything was working until today, the gnome-sound-applet does not detect any sound card. Alsamixer however is working and I can change volume.
I noticed that pulseaudio is not running and that start-pulseaudio-x11 gives me an error :
E: [pulseaudio] main.c: Daemon startup failed.
00:08.0 Audio device: NVIDIA Corporation MCP79 High Definition Audio (rev b1)
Any idea ?