restart sound daemon

Symptoms: No sound after reboot.

MPlayer complains:
AO: [pulse] Init failed: Connection refused
Failed to initialize audio driver 'pulse'
[AO_ALSA] alsa-lib: pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Connection refused




Solution:
(diagnose)



 cat /proc/asound/cards

(as root)
alsactl restore 0

(as user)
pulseaudio -k
pulseaudio -D

Thanks to: this link (scroll down to "research part 2")