Bug#1079568: pulseaudio: fail to start automatically on a "slow" home dir

[Yangfl]

Package: pulseaudio

Dear Maintainer,

pulseaudio failed to start on some of my machines with 'fscrypt'
encrypted home dir, but everything went fine after DE was completely
initialized, either with 'systemctl --user restart
pulseaudio.service', or with 'pulseaudio --daemonize=no'.

After examining 'journalctl --user -xe', I found a related error
message from pulseaudio.service:

  Failed to create secure directory (/home/xxx/.config/pulse): No such
file or directory

and systemd gave up restarting it after 5 failures in a row, which
gave me a hint that the problematic machine has a crappy ssd with
really bad IO performance.

Since systemd service file does not provide options like
'WaitForDirectory', I workaround it by adding something like
'RestartSec=10'.

This issue might be related to https://bugs.debian.org/986688 , but
the fix in that bug report does not work for me.