Bug#731300: E: [autospawn] core-util.c: Failed to create secure directory (/run/user/0/pulse: Permission denied

[Ernest Adrogué]

2014-01- 2, 11:22 (+0100); Ernest Adrogué escriu:
> Package: pulseaudio
> Version: 4.0-6+b1
> Followup-For: Bug #731300
> 
> Dear Maintainer,
> 
> This does not look like pulseaudio-specific.
> 
> I see the same bug as the OP.  Pulseaudio starts normally, at some point it
> crashes and refuses to restart complaining it can't create a directory in
> /run/user/0/ which is owned by root.
> 
> However my .xsession-errors file indicates that dconf is also having the
> same problem:
> 
> (x-www-browser:12505): dconf-CRITICAL **: unable to create directory
> '/run/user/0/dconf': S’ha denegat el permís.  dconf will not work properly.

It's a systemd/PAM issue.

$ echo $XDG_RUNTIME_DIR
/run/user/0

when it should be /run/user/1000.

See this (comment #46 and beyond):
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1197395