[Bug 57455] Re: Sound works sometimes on boot - sometimes not

[maco]

Possible fix (worked for me, thanks to gnubien on #alsa):

add this to /etc/modules
options snd-hda-intel model=m2-2

Changes will take effect on reboot.  To get it going *now*:

lsof /dev/snd/*

and close every app listed (easiest to do so through the process manager / task manager thing), then do it again to make sure there's no output (meaning all the sound apps are closed).  If there's no output:
sudo modprobe -r snd-hda-intel

then 
sudo modprobe snd-hda-intel

and sound should be there.

-- 
Sound works sometimes on boot - sometimes not
https://launchpad.net/bugs/57455