Your message dated Thu, 15 Jun 2023 10:33:05 +0000
with message-id <e1q9khp-00d65a...@fasolo.debian.org>
and subject line Bug#995366: fixed in xfce4-pulseaudio-plugin 0.4.7-1
has caused the Debian Bug report #995366,
regarding xfce4-pulseaudio-plugin: repeatedly polls D-Bus names, should watch
NameOwnerChanged instead
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
995366: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=995366
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: xfce4-pulseaudio-plugin
Version: 0.4.3-1
Severity: normal
Tags: upstream
While using debian-live-11.0.0-amd64-xfce.iso to try to reproduce an
unrelated issue, I noticed that the pulseaudio plugin for the panel
calls the ListNames() D-Bus method approximately once per second.
This causes the system to wake up unnecessarily, and is likely to be
a waste of electricity on an otherwise idle system. It also makes it
more difficult to debug the unrelated issue with dbus-monitor :-)
Looking at upstream source code, this seems to be because it calls
pulseaudio_mpris_tick_cb() once per second, which calls
pulseaudio_mpris_get_available_players(), which calls ListNames.
This shouldn't be necessary: D-Bus is designed to be completely idle (no
messages sent, no messages received, no wakeups) if nothing interesting
is happening, similar to other AF_UNIX-based protocols such as X11.
Workaround: remove the Pulseaudio plugin (the volume control) from the
panel while debugging D-Bus-related issues.
I tried to report this upstream, but so far I have been unable to set
up an account on XFCE's Gitlab (presumably the email confirmation has
been greylisted).
For protocols like MPRIS that use an equivalence class of names starting
with a prefix, the intended pattern since dbus-daemon 1.6.0 (stable
release in 2012) is this:
* Add a match rule for the NameOwnerChanged signal with
arg0namespace="org.mpris.MediaPlayer2"
- in GDBus, this is something like:
g_dbus_connection_signal_subscribe (connection,
"org.freedesktop.DBus",
"org.freedesktop.DBus",
"NameOwnerChanged",
"/org/freedesktop/DBus",
"org.mpris.MediaPlayer2",
G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_NAMESPACE,
name_owner_changed_cb, ...);
* When the signal is received, its arguments are the name, the old owner,
and the new owner
- if the new owner is "", the name is disappearing from the bus:
remove it from the list of MPRIS media players
- otherwise, the name is appearing on the bus: add it to the list of
MPRIS media players
* After connecting to the signal, call ListNames *once* to populate the
initial list of MPRIS media players
smcv
--- End Message ---
--- Begin Message ---
Source: xfce4-pulseaudio-plugin
Source-Version: 0.4.7-1
Done: Unit 193 <unit...@debian.org>
We believe that the bug you reported is fixed in the latest version of
xfce4-pulseaudio-plugin, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to 995...@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Unit 193 <unit...@debian.org> (supplier of updated xfce4-pulseaudio-plugin
package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmas...@ftp-master.debian.org)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA384
Format: 1.8
Date: Thu, 15 Jun 2023 05:21:29 -0400
Source: xfce4-pulseaudio-plugin
Architecture: source
Version: 0.4.7-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Xfce Maintainers <debian-xfce@lists.debian.org>
Changed-By: Unit 193 <unit...@debian.org>
Closes: 995366
Changes:
xfce4-pulseaudio-plugin (0.4.7-1) unstable; urgency=medium
.
* New upstream version 0.4.7.
- Subscribe NameOwnerChanged to watch MPRIS changes instead of timer.
Closes: #995366
* d/rules:
- Use execute_after_auto_install instead of override_dh_auto_install.
* d/docs, d/rules: Opt-out of trimmed changelogs, install NEWS as changelog.
* Update Standards-Version to 4.6.2.
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