How to restart pulseaudio via systemd?

Question

As my sound is not working well after hibernation, I tried to use systemd to kill pulseaudio while my pc fall asleep and to start it when my pc wakes up. But I can't do this. Following the archwiki, I made to .service files:
root:/etc/systemd/system# cat [email protected]
[Unit]
Description=User suspend actions
Before=sleep.target
[Service]
User=%I
Environment=DISPLAY=:0
Type=oneshot
ExecStart= /usr/bin/pulseaudio -k
ExecStart= /usr/bin/xscreensaver-command --lock
[Install]
WantedBy=sleep.target
and
root:/etc/systemd/system# cat [email protected]
[Unit]
Description=User resume actions
After=suspend.target
[Service]
User=%I
Environment=DISPLAY=:0
Type=oneshot
ExecStart= /usr/bin/start-pulseaudio-x11
[Install]
WantedBy=suspend.target
Next, I enabled them:
root:/etc/systemd/system# systemctl enable [email protected]
ln -s '/etc/systemd/system/[email protected]' '/etc/systemd/system/suspend.target.wants/[email protected]'
root:/etc/systemd/system# systemctl enable [email protected]
ln -s '/etc/systemd/system/[email protected]' '/etc/systemd/system/sleep.target.wants/[email protected]'
I rebooted the system, but this doesn't work. This is what I got when I had started the suspend service.
root:/etc/systemd/system# systemctl start [email protected]
Job for [email protected] failed. See 'systemctl status [email protected]' and 'journalctl -xn' for details.
root:/etc/systemd/system# systemctl status [email protected]
[email protected] - User suspend actions
Loaded: loaded (/etc/systemd/system/[email protected]; enabled)
Active: failed (Result: exit-code) since Tue 2013-04-30 23:09:08 CEST; 14s ago
Process: 5186 ExecStart=/usr/bin/pulseaudio -k (code=exited, status=1/FAILURE)
Apr 30 23:09:08 morfina pulseaudio[5186]: E: [pulseaudio] main.c: Failed to kill daemon: No such process
Apr 30 23:09:08 morfina systemd[1]: [email protected]: main process exited, code=exited, status=1/FAILURE
Apr 30 23:09:08 morfina systemd[1]: Failed to start User suspend actions.
Apr 30 23:09:08 morfina systemd[1]: MESSAGE=Unit [email protected] entered failed state.
root:/etc/systemd/system# journalctl -xn
-- Logs begin at Sun 2013-04-28 00:14:17 CEST, end at Tue 2013-04-30 23:09:08 CEST. --
Apr 30 23:09:08 morfina systemd[1]: Starting User suspend actions...
-- Subject: Unit [email protected] has begun with start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- Unit [email protected] has begun starting up.
Apr 30 23:09:08 morfina pulseaudio[5186]: E: [pulseaudio] main.c: Failed to kill daemon: No such process
Apr 30 23:09:08 morfina systemd[1]: [email protected]: main process exited, code=exited, status=1/FAILURE
Apr 30 23:09:08 morfina systemd[1]: Failed to start User suspend actions.
-- Subject: Unit [email protected] has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- Documentation: http://www.freedesktop.org/wiki/Software/systemd/catalog/be02cf6855d2428ba40df7e9d022f03d
-- Unit [email protected] has failed.
-- The result is failed.
Apr 30 23:09:08 morfina systemd[1]: MESSAGE=Unit [email protected] entered failed state.
The most important part:
pulseaudio[5186]: E: [pulseaudio] main.c: Failed to kill daemon: No such process
I don't know why this happens. Pulse demon exists, but systemd cannot kill it because it thinks there is no such process.
root:/etc/systemd/system# ps -eo "user args" | grep pulse
morfik /usr/bin/pulseaudio --start
morfik /usr/lib/pulse/gconf-helper
root grep --color=auto pulse
I can kill pulse in terminal as normal user though.
morfik:~$ /usr/bin/pulseaudio -k
root:/etc/systemd/system# ps -eo "user args" | grep pulse
root grep --color=auto pulse
The same with [email protected]
root:/etc/systemd/system# systemctl start [email protected]
root:/etc/systemd/system# systemctl status [email protected]
[email protected] - User resume actions
Loaded: loaded (/etc/systemd/system/[email protected]; enabled)
Active: inactive (dead) since Tue 2013-04-30 23:32:09 CEST; 2s ago
Process: 7183 ExecStart=/usr/bin/start-pulseaudio-x11 (code=exited, status=0/SUCCESS)
Apr 30 23:32:06 morfina systemd[1]: Starting User resume actions...
Apr 30 23:32:06 morfina pulseaudio[7187]: [pulseaudio] sink.c: Default and alternate sample rates are the same.
Apr 30 23:32:06 morfina pulseaudio[7187]: [pulseaudio] source.c: Default and alternate sample rates are the same.
Apr 30 23:32:09 morfina systemd[1]: Started User resume actions.
But there is no such process.
I tried to start pulse demon using:
/usr/bin/pulseaudio -D
/usr/bin/pulseaudio --start
/usr/bin/start-pulseaudio-x11
and everything goes smooth while I'm doing it as a normal user in a terminal, but when I try to put it into systemd service file, everything starts to break.

Answer 1

OK, I'm a bit further and got a error message now:
In /etc/systemd/system/[email protected] I start the script /home/carl/scripts/reload-sys-mon.sh
but that leads to the following error message:
$ sudo systemctl status resume@carl
[email protected] - User resume actions
Loaded: loaded (/etc/systemd/system/[email protected]; enabled)
Active: deactivating (stop-sigterm) since Do 2013-06-20 10:53:08 CEST; 571ms ago
Process: 1548 ExecStart=/usr/bin/sh -c /home/carl/scripts/reload-sys-mon.sh (code=exited, status=0/SUCCESS)
CGroup: name=systemd:/system/[email protected]/[email protected]
└─1554 dbus-launch --autolaunch=0b13b59cd91045ad9b746f7b36da8550 --binary-syntax --close-stderr
Jun 20 10:53:05 cookbook systemd[1]: Starting User resume actions...
Jun 20 10:53:05 cookbook systemd[1]: Started User resume actions.
Jun 20 10:53:08 cookbook sh[1548]: Error: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.Shell was not provided by any service files
So the problem is some kind of strange dbus problem: If I execute my reload-sys-mon.sh script directly, it works without problem!
But if systemd calls it, it gives me the error above.
Why?
Reference: the reload-sys-mon.sh script:
#!/bin/bash
sleep 10s && gdbus call --session --dest org.gnome.Shell --object-path /org/gnome/Shell --method org.gnome.Shell.Extensions.ReloadExtension [email protected]
exit 0
And indeed, in  /usr/share/dbus-1/services there is no service file for org.gnome.Shell.
Looking at the other files there, making such a file seems not so hard (just 3 lines, e.g. [D-BUS Service]   Name=org.freedesktop.ColorHelper    Exec=/usr/lib/colord/colord-session), but I don't know what to put in the "Exec=" line. I tried Exec=/usr/bin/gnome-shell, but that didn't work.
So does anyone know how to create such a service file for org.gnome.Shell?
Last edited by Carl Karl (2013-06-20 10:30:22)